14 Best Through the Wall Air Conditioners for 2027

The best through-the-wall air conditioner overall in this roundup is the LG 11,800 BTU model with remote, a strong starting point for buyers who want straightforward cooling from an established brand. For more flexibility, the OLMO 14,000 BTU AC and heater adds built-in smart controls and supplemental heat, while the Keystone 10,000 BTU model pairs cooling with dehumidifying. The right choice depends on more than cooling capacity: room size, electrical supply, wall-sleeve fit, heating needs, and control features all affect whether a unit suits your home. Higher capacity can serve larger rooms, but it may require 230V power and a suitable opening. Read on for the full breakdown, buying guidance, and answers to common fit and installation questions.

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Key Takeaways

• Capacity and electrical supply go together: The 14,000 BTU OLMO and TCL options add heat and smart features, but their 230V requirements make them a different fit from 115V models.
• Supplemental heat is available across several sizes: OLMO, Keystone, Whirlpool, and TCL offer heating options, so buyers can compare room capacity and controls rather than assuming heat belongs only to the largest units.
• Cooling-only models keep the job simpler: The OLMO 8,000 BTU and 12,000 BTU cooling-only options suit buyers who do not need heat, though each still needs a compatible wall opening and electrical setup.
• Dehumidification appears in multiple capacity classes: Keystone’s 10,000 BTU, Frigidaire’s 10,000 BTU, and Frigidaire’s 12,000 BTU options let damp-room buyers weigh moisture control alongside cooling.
• Brand name alone does not decide the fit: The lineup includes LG models from 7,800 to 11,800 BTU, while other brands span cooling-only, heat, smart controls, and different voltage needs.

Our Top Through The Wall Air Conditioner Picks

LG 11,800 BTU Through-the-Wall Air Conditioner with Remote		Best Overall	Cooling capacity: 11,800 BTU	Room coverage: Up to 530 sq. ft.	Voltage: 115 V	VIEW ON AMAZON	See Our Full Breakdown
OLMO 12,000 BTU 115V Through-the-Wall Air Conditioner, Cooling Only, with Smart Kit		Best for Smart Controls	Cooling capacity: 12,000 BTU (1 ton)	Voltage: 115 V, single phase, 60 Hz	Refrigerant: R-32	VIEW ON AMAZON	See Our Full Breakdown
Keystone 10,000 BTU Through-the-Wall Air Conditioner and Dehumidifier		Best for Quieter, Moisture-Prone Rooms	Cooling capacity: 10,000 BTU	Coverage: Up to 450 sq. ft.	Dehumidification rate: 2.3 pints per hour	VIEW ON AMAZON	See Our Full Breakdown
OLMO 8,000 BTU Through-the-Wall Air Conditioner, Cooling Only		Best Compact-Capacity Smart Pick	Cooling capacity: 8,000 BTU	Voltage: 115 V	Refrigerant: R-32	VIEW ON AMAZON	See Our Full Breakdown
OLMO 8,000 BTU Through-the-Wall Air Conditioner and Heater with Remote and Wi-Fi		Best for Small Rooms That Need Heating Too	Cooling capacity: 8,000 BTU/h	Heating capacity: 4,200 BTU/h	Voltage and frequency: 115 V, 60 Hz	VIEW ON AMAZON	See Our Full Breakdown
Keystone 10,000 BTU Wall-Mounted Air Conditioner with Supplemental Heat and Dehumidifier (230V)		Best for Year-Round Room Control	Cooling capacity: 10,000 BTU	Heating capacity: 10,600 BTU supplemental	Coverage area: Up to 450 sq. ft.	VIEW ON AMAZON	See Our Full Breakdown
LG 7,800 BTU Through-the-Wall Air Conditioner with Remote		Best for Smaller Rooms and Standard Voltage	Model: LT0816CER	Cooling capacity: 7,800 BTU	Coverage area: Up to 330 sq. ft.	VIEW ON AMAZON	See Our Full Breakdown
OLMO 14,000 BTU 230V Through-the-Wall AC & Heater, Built-In Smart Kit		Best Premium Smart Pick for Larger Rooms	Cooling capacity: 14,000 BTU/h	Heating capacity: 10,600 BTU	Voltage: 208–230V single-phase	VIEW ON AMAZON	See Our Full Breakdown
Whirlpool 12,000 BTU Through-the-Wall Air Conditioner with Supplemental Heat		Best for Larger Rooms with Simple Airflow Control	Cooling capacity: 12,000/11,600 BTU	Supplemental heat capacity: 10,600/8,600 BTU	Recommended room size: Up to 550 sq. ft.	VIEW ON AMAZON	See Our Full Breakdown
LG 9,800 BTU Through-the-Wall Air Conditioner, 115V, White		Best 115V Choice for Mid-Sized Rooms	Cooling capacity: 9,800 BTU	Voltage: 115V	Coverage area: Up to 440 sq. ft.	VIEW ON AMAZON	See Our Full Breakdown
Frigidaire 115V 10000 BTU Wall Air Conditioner with Dehumidifier, Fan		Best for Mid-Size Rooms	Cooling capacity: 10,000 BTU	Listed cooling area: Up to 450 sq. ft.	Voltage: 115V	VIEW ON AMAZON	See Our Full Breakdown
TCL 14,000 BTU Smart Through-the-Wall Air Conditioner with Heater		Best for Large Rooms and Smart Control	Cooling capacity: 14,000 BTU	Heating capacity: 13,600 BTU	Recommended room size: Up to 700 sq. ft.	VIEW ON AMAZON	See Our Full Breakdown
Frigidaire 12,000 BTU Through-the-Wall Air Conditioner with Dehumidifier and Remote		Best for More Cooling Headroom on 115V	Cooling capacity: 12,000 BTU	Listed coverage area: Up to 550 sq. ft.	Voltage: 115V	VIEW ON AMAZON	See Our Full Breakdown
Keystone 8,000 BTU Through-the-Wall Air Conditioner with Supplemental Heat		Best for Smaller Rooms and Shoulder-Season Heat	Cooling capacity: 8,000 BTU	Supplemental heating capacity: 4,200 BTU	Listed coverage area: Up to 350 sq. ft.	VIEW ON AMAZON	See Our Full Breakdown

More Details on Our Top Picks

1. LG 11,800 BTU Through-the-Wall Air Conditioner with Remote

   

   Best Overall

   View on Amazon

   I’d put this LG near the top for buyers cooling a larger room who want a straightforward wall unit rather than app-based controls. Its 11,800 BTU capacity is rated for spaces up to 530 square feet, giving it more reach than the Keystone 10,000 BTU model, which is rated for up to 450 square feet. Three speeds, three operating modes, and four-way air deflection give you flexibility to direct air around a room, while the remote and washable filter make routine operation and upkeep simpler.

   The tradeoff is installation: this is not a window unit, and its wall sleeve is sold separately. At 60 dB, it may also be a less appealing fit for noise-sensitive bedrooms than the quieter Keystone. I’d choose it for broad cooling coverage and practical included accessories, not for the quietest operation or smart-home control.

   Pros:

   • Rated to cool rooms up to 530 square feet
   • Includes a remote, trim kit, outdoor grille, and insulation foam
   • Washable, reusable filter reduces the need for replacement filters
   • Energy Saver and Dry modes add options beyond basic cooling

   Cons:

   • Wall sleeve must be purchased separately
   • 60 dB noise level may bother light sleepers
   • Through-the-wall installation rules it out for many renters and window-only setups

   Best for: Buyers cooling a room up to 530 square feet who want a remote, reusable filter, and included trim and exterior accessories.

   Not ideal for: Renters who cannot make a wall opening, buyers needing a standard window unit, or anyone who wants app or voice control or a sleeve in the box.

   • Cooling capacity:11,800 BTU
   • Room coverage:Up to 530 sq. ft.
   • Voltage:115 V
   • Noise level:60 dB
   • Dimensions:24 in. W × 20.1 in. D × 14.4 in. H
   • Operating modes:Energy Saver, Dry, Cool
   • Filter:Washable and reusable
   • Wall sleeve:Sold separately
   Our verdict

   “Choose this LG for larger-room cooling and useful included accessories, provided you can supply the sleeve and accept its reported noise level.”

   → See it on Amazon →

2. OLMO 12,000 BTU 115V Through-the-Wall Air Conditioner, Cooling Only, with Smart Kit

   

   Best for Smart Controls

   View on Amazon

   The OLMO’s main advantage over the LG 11,800 BTU model is not a big jump in stated cooling capacity; it is control flexibility. You can operate this 12,000 BTU unit through an app, by voice, with its remote, or from the push-button panel. That mix suits households that want schedules or phone access without giving up basic physical controls. Its listed 55.3 dB noise level is also lower than the LG’s 60 dB figure, though real room noise can vary with installation and operating conditions.

   This is a cooling-only unit, so it cannot help during colder weather. The wall sleeve is not included, just as with the LG, and the listing gives no room-coverage figure to help match capacity to a particular space. I’d favor the OLMO when app or voice operation matters more than documented coverage or a broader accessory package.

   Pros:

   • Built-in smart kit supports app and voice control
   • Also offers remote and physical push-button operation
   • 12,000 BTU cooling capacity
   • Uses R-32 refrigerant

   Cons:

   • Cooling only, with no heating function
   • Wall sleeve must be purchased separately
   • Product data does not specify a room-coverage area

   Best for: Homeowners or small commercial-space operators who want app, voice, remote, and panel controls on a 115V wall-mounted cooling unit.

   Not ideal for: Buyers who need heating, want a wall sleeve included, or need a stated room-coverage rating before choosing capacity.

   • Cooling capacity:12,000 BTU (1 ton)
   • Voltage:115 V, single phase, 60 Hz
   • Refrigerant:R-32
   • Noise level:55.3 dB
   • Dimensions:20.28 in. D × 24.21 in. W × 14.53 in. H
   • Control methods:App, voice, remote, push-button panel
   • Warranty:1-year limited
   • Wall sleeve:Not included
   Our verdict

   “Pick the OLMO over the LG when smart controls are the priority and you do not need heat or a stated coverage rating.”

   → See it on Amazon →

3. Keystone 10,000 BTU Through-the-Wall Air Conditioner and Dehumidifier

   

   Best for Quieter, Moisture-Prone Rooms

   View on Amazon

   Compared with the higher-capacity LG 11,800 BTU, the Keystone is aimed at more modest rooms: its 10,000 BTU rating covers up to 450 square feet. Its stronger distinction is the combination of cooling and moisture removal, with a stated rate of 2.3 pints per hour. That can make it a sensible match for a humid bedroom or living area where clammy air is part of the problem, not just high temperature.

   The listed 50.2 dB noise level is lower than the LG’s 60 dB, making the Keystone the more appealing of those two on paper for quieter spaces. A remote with a built-in thermostat can help you manage comfort from across the room, and the timer, sleep, and energy-saving modes add useful scheduling choices. The tradeoff is no inverter, and its 450-square-foot coverage is less suited to larger open rooms.

   Pros:

   • Rated for rooms up to 450 square feet
   • Removes up to 2.3 pints of moisture per hour
   • Remote includes a built-in thermostat
   • Offers a 24-hour timer plus sleep and energy-saving modes

   Cons:

   • No inverter
   • Lower stated coverage than the LG 11,800 BTU model
   • Requires a through-the-wall installation

   Best for: Buyers with a room up to 450 square feet who want cooling, measurable moisture removal, and thermostat-based remote control.

   Not ideal for: People cooling larger open-plan spaces or buyers specifically seeking inverter technology.

   • Cooling capacity:10,000 BTU
   • Coverage:Up to 450 sq. ft.
   • Dehumidification rate:2.3 pints per hour
   • Voltage:115 V
   • Noise level:50.2 dB
   • Wattage:1,040 W
   • Timer:24-hour programmable
   • Refrigerant:R-32
   Our verdict

   “Choose the Keystone for a medium-sized, humid room where quieter listed operation and moisture removal matter more than maximum capacity.”

   → See it on Amazon →

4. OLMO 8,000 BTU Through-the-Wall Air Conditioner, Cooling Only

   

   Best Compact-Capacity Smart Pick

   View on Amazon

   For a smaller bedroom, office, or studio, this OLMO’s 8,000 BTU capacity avoids the higher nominal capacity of the 10,000 BTU Keystone and 11,800 BTU LG models. Its listed 49.5 dB noise level is also lower than either of those products’ figures, which may appeal in a space where a louder unit would be distracting. Wi-Fi control, an included remote, sleep mode, and a timer give it a more connected feature set than a basic small-room wall air conditioner.

   The important distinction from the other OLMO in this batch is that this model is cooling only; the 8,000 BTU OLMO with heater adds a modest 4,200 BTU heating function. The wall sleeve is not included in either case. I’d keep this unit on the shortlist for smaller spaces where app control matters, but not for buyers expecting heating or a published room-coverage figure. The listed wattage also merits checking against the manufacturer’s current documentation before purchase.

   Pros:

   • Wi-Fi and app control plus an included remote and panel
   • 8,000 BTU capacity suits smaller-room use
   • Listed noise level is 49.5 dB
   • Includes sleep mode, timer, and multiple fan speeds

   Cons:

   • Cooling only, unlike the OLMO 8,000 BTU heater model
   • Wall sleeve is not included
   • Product data provides no room-coverage figure

   Best for: People cooling a smaller bedroom, studio, or office who want Wi-Fi and remote control without paying for a heating function they will not use.

   Not ideal for: Buyers needing supplemental heat, a stated coverage area, or an included wall sleeve.

   • Cooling capacity:8,000 BTU
   • Voltage:115 V
   • Refrigerant:R-32
   • Noise level:49.5 dB
   • Dimensions:20.28 × 24.21 × 14.53 in. (D × W × H)
   • Controls:Wi-Fi, app, remote, digital panel
   • Inverter:No
   • Wall sleeve:Not included
   Our verdict

   “Choose this OLMO for smart-controlled cooling in a smaller room if you do not need heat and can source the sleeve separately.”

   → See it on Amazon →

5. OLMO 8,000 BTU Through-the-Wall Air Conditioner and Heater with Remote and Wi-Fi

   

   Best for Small Rooms That Need Heating Too

   View on Amazon

   This OLMO fills a different gap from the cooling-only 8,000 BTU OLMO: it adds 4,200 BTU of heating alongside 8,000 BTU of cooling. That pairing can suit a small room needing seasonal temperature adjustment without stepping up to a larger unit such as the 11,800 BTU LG, which is listed for cooling rather than heating. Wi-Fi, a remote, and a digital control panel provide several ways to operate it, while its 115V requirement fits buyers looking for a standard-voltage option.

   Its heating capacity is modest, so I’d treat it as supplemental heat rather than a substitute for a primary heating system. The stated 52 dB noise level is higher than the cooling-only OLMO’s 49.5 dB figure, and this unit weighs 77 pounds. Like the other OLMO models here, it requires a separate wall sleeve. It makes sense when heating capability matters more than the quietest listed operation or maximum cooling reach.

   Pros:

   • Provides both 8,000 BTU cooling and 4,200 BTU heating
   • Supports Wi-Fi and smartphone control
   • Includes both a digital panel and remote
   • Runs on 115 V

   Cons:

   • Heating capacity is limited and best treated as supplemental
   • Wall sleeve must be purchased separately
   • At 77 lb, handling and installation may take more than one person

   Best for: Owners of a small bedroom, office, or studio who want wall-installed cooling plus supplemental heat and Wi-Fi control.

   Not ideal for: Buyers who need primary heating for a large space, want the quietest listed OLMO, or need a wall sleeve included.

   • Cooling capacity:8,000 BTU/h
   • Heating capacity:4,200 BTU/h
   • Voltage and frequency:115 V, 60 Hz
   • Noise level:52 dB
   • Dimensions:20.28 × 24.21 × 14.53 in. (D × W × H)
   • Weight:77 lb
   • Controls:Wi-Fi, digital panel, remote
   • Wall sleeve:Not included
   Our verdict

   “Choose this OLMO over its cooling-only sibling when a small room needs supplemental heat as well as app-controlled cooling.”

   → See it on Amazon →

6. Keystone 10,000 BTU Wall-Mounted Air Conditioner with Supplemental Heat and Dehumidifier (230V)

   

   Best for Year-Round Room Control

   View on Amazon

   The Keystone pairs 10,000 BTU cooling with 10,600 BTU of supplemental heat, making it a practical pick for a room that needs cooling in summer and a modest temperature boost in milder weather. Its built-in-thermostat remote, dehumidification, and energy-saving modes add useful control without taking up window or floor space. Compared with the LG 9,800 BTU, it adds supplemental heat and moisture removal, but the LG is a better fit for buyers who need a standard 115V connection. This Keystone requires a dedicated 230V/20-amp outlet, so electrical compatibility can determine whether it is an easy choice or a costly installation project. Its 58 dB noise level may also stand out in a quiet bedroom, and the heating function is not a substitute for primary heat.

   Pros:

   • Combines 10,000 BTU cooling with supplemental heating
   • Built-in thermostat in the remote supports more targeted temperature control
   • Removes up to 2.3 pints of moisture per hour
   • Wall-mounted installation keeps windows and floor space clear

   Cons:

   • Requires a dedicated 230V/20-amp outlet rather than a standard household outlet
   • Supplemental heat is not intended to replace primary heating
   • 58 dB operation may be noticeable in quiet spaces

   Best for: Homeowners with an existing 230V/20-amp outlet who want through-the-wall cooling, moisture removal, and supplemental heat in a room up to 450 square feet.

   Not ideal for: Renters or buyers with only standard 115V outlets, and anyone relying on the unit as a room’s primary heating source.

   • Cooling capacity:10,000 BTU
   • Heating capacity:10,600 BTU supplemental
   • Coverage area:Up to 450 sq. ft.
   • Voltage:230V; requires a 20-amp outlet
   • Wattage:3,450 watts
   • Noise level:58 dB
   • Dehumidification:Up to 2.3 pints per hour
   • Refrigerant:R-32
   Our verdict

   “Choose the Keystone if you have compatible 230V power and want cooling, dehumidification, and backup heat in one through-the-wall unit.”

   → See it on Amazon →

7. LG 7,800 BTU Through-the-Wall Air Conditioner with Remote

   

   Best for Smaller Rooms and Standard Voltage

   View on Amazon

   The LG LT0816CER is a sensible match for a smaller bedroom or home office where 115V compatibility matters more than extra capacity. Its 7,800 BTU output is rated for rooms up to 330 square feet, and three cooling speeds, several modes, and four-way air deflection help direct air where it is needed. Unlike the higher-capacity LG 9,800 BTU, this model is better scaled to smaller spaces, where a larger unit may be unnecessary; the tradeoff is less headroom for bigger or more open rooms. A remote, washable filter, and trim kit are included, but the wall sleeve is sold separately. It is built for through-the-wall installation rather than standard window use, so buyers should confirm the wall opening and sleeve plan before choosing it.

   Pros:

   • 115V operation fits standard household power
   • Capacity is suited to rooms up to 330 square feet
   • Remote, washable filter, and trim kit are included
   • Four-way air deflection helps direct airflow around the room

   Cons:

   • Wall sleeve is sold separately
   • Lower capacity than the LG 9,800 BTU model for larger rooms
   • Designed for through-the-wall installation, not standard window installation

   Best for: Buyers cooling a bedroom, office, or other enclosed room up to 330 square feet who have a 115V outlet and want straightforward controls.

   Not ideal for: People cooling larger open-plan areas or anyone who needs a unit ready for installation without sourcing a separate wall sleeve.

   • Model:LT0816CER
   • Cooling capacity:7,800 BTU
   • Coverage area:Up to 330 sq. ft.
   • Voltage:115V
   • Wattage:750 watts
   • Energy efficiency ratio:10.7 EER
   • Noise level:56 dB
   • Dimensions:20.1 x 24 x 14.4 in.
   • Moisture removal:2.1 pints per hour
   Our verdict

   “Pick this LG for a smaller room and standard-voltage setup if its lower capacity suits your space and you can provide a wall sleeve.”

   → See it on Amazon →

8. OLMO 14,000 BTU 230V Through-the-Wall AC & Heater, Built-In Smart Kit

   

   Best Premium Smart Pick for Larger Rooms

   View on Amazon

   For buyers who want a high-capacity through-the-wall unit with connected controls, the OLMO combines 14,000 BTU cooling, 10,600 BTU heating, and app, remote, button, and voice control. That mix gives it a broader role than the LG 9,800 BTU, which cools a smaller area and does not add heat or smart control. The OLMO’s 230V requirement narrows its audience, however, and the wall cover is sold separately, so it is not the simplest choice for a plug-and-play replacement. Its listed 49.5 dB noise level is lower than the Keystone 10,000 BTU’s 58 dB, though it can still be audible in a quiet room. Buyers should also account for the one-year limited warranty and confirm installation requirements before committing.

   Pros:

   • 14,000 BTU cooling capacity for larger spaces
   • Adds 10,600 BTU heating to cooling operation
   • Supports app, remote, push-button, and voice control
   • 49.5 dB listed noise level is lower than the Keystone 10,000 BTU’s 58 dB

   Cons:

   • Requires 208–230V power rather than a standard 115V outlet
   • Wall cover is sold separately
   • One-year limited warranty

   Best for: Owners of larger rooms who already have suitable 208–230V power and want app or voice control alongside cooling and supplemental heat.

   Not ideal for: Shoppers with only 115V power, buyers who want a complete wall-cover setup in the box, or anyone seeking a quiet, low-capacity unit for a small room.

   • Cooling capacity:14,000 BTU/h
   • Heating capacity:10,600 BTU
   • Voltage:208–230V single-phase
   • SEER:14
   • Noise level:49.5 dB
   • Refrigerant:R-32
   • Control methods:App, remote, push button, and voice
   • Warranty:1-year limited
   Our verdict

   “Choose the OLMO for a larger room and connected controls if you have 208–230V power and are prepared to source the wall cover separately.”

   → See it on Amazon →

9. Whirlpool 12,000 BTU Through-the-Wall Air Conditioner with Supplemental Heat

   

   Best for Larger Rooms with Simple Airflow Control

   View on Amazon

   The Whirlpool targets rooms up to 550 square feet and adds supplemental heat, making it a stronger fit for a broad living area than the smaller LG 7,800 BTU. Its eight-way directional louvers give buyers more flexibility to steer airflow, while Eco and Sleep functions and a 24-hour timer support scheduled operation. The quick-access filter is also convenient for routine cleaning. The main qualification is electrical: this model needs a 230V/15A outlet, unlike the 115V LG units in this roundup. Its heat is supplemental rather than a full cold-weather heating solution, so it should not be chosen as a replacement for a primary heater. Check sleeve dimensions too: the stated compatibility range is 24.5 to 27 inches, which can rule it out for an existing wall opening.

   Pros:

   • Designed for spaces up to 550 square feet
   • Eight-way directional louvers provide flexible airflow direction
   • Includes Eco, Sleep, and programmable 24-hour timer functions
   • Quick-access filter simplifies removal and cleaning

   Cons:

   • Requires a 230V/15A outlet
   • Supplemental heat is not intended as primary heating in cold months
   • Sleeve compatibility is limited to widths of 24.5–27 inches

   Best for: Households cooling a larger room up to 550 square feet that have a 230V/15A outlet and want adjustable airflow plus occasional supplemental heat.

   Not ideal for: Buyers with standard 115V power, smaller rooms, or an existing wall sleeve outside the stated 24.5–27-inch compatibility range.

   • Cooling capacity:12,000/11,600 BTU
   • Supplemental heat capacity:10,600/8,600 BTU
   • Recommended room size:Up to 550 sq. ft.
   • Voltage and outlet:230V/15A
   • Dimensions:20.3 in. D x 24.2 in. W x 14.5 in. H
   • Sleeve width compatibility:24.5–27 in.
   • Fan speeds:3
   • Operating modes:4
   • Directional louvers:8-way
   Our verdict

   “The Whirlpool suits larger rooms with compatible 230V power, especially when adjustable airflow and occasional supplemental heat matter more than primary heating.”

   → See it on Amazon →

10. LG 9,800 BTU Through-the-Wall Air Conditioner, 115V, White

    

    Best 115V Choice for Mid-Sized Rooms

    View on Amazon

    This LG fills the gap between the 7,800 BTU LG and 230V models: it delivers 9,800 BTU cooling for rooms up to 440 square feet while using a standard 115V connection. That makes it a practical option for buyers who need more capacity than the smaller LG LT0816CER but cannot use the 230V Keystone or Whirlpool. Dry mode removes up to 2.9 pints of moisture per hour, and four-way air deflection helps distribute air around a room rather than sending it in one fixed direction. A remote and trim kit are included, along with a reusable filter. Its 10.7 EER and cooling-only design are less versatile than the Keystone 10,000 BTU, which adds supplemental heat, and it is not suited to standard window installation.

    Pros:

    • 9,800 BTU capacity covers rooms up to 440 square feet
    • Runs on 115V household power
    • Dry mode removes up to 2.9 pints of moisture per hour
    • Four-way air deflection, remote, and trim kit are included

    Cons:

    • Cooling-only design lacks the supplemental heat offered by the Keystone 10,000 BTU
    • Not properly vented for standard window installation

    Best for: People cooling a mid-sized room up to 440 square feet who need a 115V through-the-wall unit with moisture removal and included remote control.

    Not ideal for: Buyers who want supplemental heat, need a unit for standard window installation, or are cooling spaces larger than the stated coverage area.

    • Cooling capacity:9,800 BTU
    • Voltage:115V
    • Coverage area:Up to 440 sq. ft.
    • Energy efficiency ratio:10.7 EER
    • Cooling speeds:3
    • Preprogrammed modes:3
    • Moisture removal:Up to 2.9 pints per hour
    • Air deflection:4-way
    • Filter:Washable, reusable
    Our verdict

    “Choose this LG if you need mid-sized-room cooling on 115V power and do not need supplemental heat or window installation.”

    → See it on Amazon →

11. Frigidaire 115V 10000 BTU Wall Air Conditioner with Dehumidifier, Fan

    

    Best for Mid-Size Rooms

    View on Amazon

    For a medium room that needs cooling plus moisture control, this Frigidaire offers a straightforward through-the-wall setup with 10,000 BTU of capacity for spaces listed up to 450 square feet. Its 115V power requirement may suit buyers who want to avoid the 230V electrical requirement of the larger TCL 14,000 BTU model, though room size and existing wiring still matter. The remote, 24-hour timer, sleep mode, and washable filter make everyday operation and upkeep simpler. An air ionizer adds another air-treatment feature, but it should not be the main reason to choose the unit over a model with a closer fit to your space. The tradeoff is substantial weight at 67 pounds and a listed noise level of 56 dB; compared with the 12,000 BTU Frigidaire, this model has less stated coverage but also lower listed wattage.

    Pros:

    • 10,000 BTU capacity is listed for rooms up to 450 square feet.
    • 115V electrical requirement, unlike the 230V TCL 14,000 BTU model.
    • Remote, 24-hour timer, and sleep mode support convenient scheduling.
    • Washable mesh filter and dehumidifier simplify routine care and moisture management.

    Cons:

    • At 67 pounds, installation may call for help and a suitable wall opening.
    • No inverter technology is listed, so buyers seeking that efficiency feature should look elsewhere.
    • Listed 56 dB noise level may be noticeable in a quiet sleeping space.

    Best for: People cooling a medium-sized bedroom or living area who want 115V operation, a remote, and a built-in dehumidifier.

    Not ideal for: Buyers who need coverage beyond 450 square feet, want inverter technology, or cannot manage a 67-pound through-wall installation.

    • Cooling capacity:10,000 BTU
    • Listed cooling area:Up to 450 sq. ft.
    • Voltage:115V
    • Wattage:970W
    • Noise level:56 dB
    • Dimensions:24 × 21.5 × 14.5 in.
    • Weight:67 lb.
    • Features:Dehumidifier, air ionizer, remote, Wi-Fi, 24-hour timer, sleep mode, washable mesh filter
    Our verdict

    “Choose this Frigidaire for a medium room where 115V operation and basic comfort controls matter more than higher capacity or inverter technology.”

    → See it on Amazon →

12. TCL 14,000 BTU Smart Through-the-Wall Air Conditioner with Heater

    

    Best for Large Rooms and Smart Control

    View on Amazon

    This TCL is the strongest fit in this group for a larger room that needs both cooling and heating: its listed capacities are 14,000 BTU for cooling and 13,600 BTU for heating, with coverage stated up to 700 square feet. App, remote, Alexa, and Google Assistant controls give it more ways to manage comfort than the simpler Frigidaire 10,000 BTU, while Sleep and Eco modes add options for routine operation. Its 230V requirement is a real installation constraint, not a minor detail, and the compatible wall sleeve is sold separately. That makes it less plug-and-plan than the 115V Frigidaire models. I’d favor it when the room size and two-season function justify the added electrical and sleeve planning; buyers with smaller spaces may be better served by a lower-capacity unit.

    Pros:

    • 14,000 BTU cooling and 13,600 BTU heating cover more needs than the 10,000 BTU Frigidaire.
    • Listed for rooms up to 700 square feet.
    • Remote, app, Alexa, and Google Assistant provide flexible control.
    • Washable filter, dehumidifier mode, and Sleep and Eco modes support routine use.

    Cons:

    • Requires 230V service, which may limit installation options.
    • Compatible wall sleeve is sold separately.
    • Actual room coverage can vary with layout and conditions.

    Best for: Homeowners with a large room, compatible 230V electrical service, and a need for app or voice control plus seasonal heating.

    Not ideal for: Renters or buyers with only 115V service, smaller rooms, or no budget or plan for sourcing the compatible wall sleeve.

    • Cooling capacity:14,000 BTU
    • Heating capacity:13,600 BTU
    • Recommended room size:Up to 700 sq. ft.
    • Voltage:230V
    • Control options:Remote, TCL Home app, Alexa, and Google Assistant
    • Modes:Cool, heat, dry, Sleep, and Eco
    • Filter:Washable and reusable
    • Compatible sleeve dimensions:26 × 20 × 15.57 in.; sleeve not included
    Our verdict

    “Pick the TCL if you need high-capacity cooling, heating, and smart controls and can accommodate its 230V connection and separate sleeve.”

    → See it on Amazon →

13. Frigidaire 12,000 BTU Through-the-Wall Air Conditioner with Dehumidifier and Remote

    

    Best for More Cooling Headroom on 115V

    View on Amazon

    For buyers who want more stated coverage than the 10,000 BTU Frigidaire without moving to the TCL’s 230V setup, this 12,000 BTU, 115V model is the middle ground. It is listed for rooms up to 550 square feet and adds a dehumidifier, air ionizer, three fan speeds, remote, timer, and sleep mode. The washable filter’s reminder light is a useful maintenance cue, particularly for a unit that stays installed through the cooling season. Compared with the smaller Frigidaire, it offers greater stated capacity, but the listed wattage rises to 1,220W and the noise level to 59 dB. At 75 pounds, it is also the heavier installation. I’d choose it for a room that genuinely needs the extra coverage, rather than paying that weight and noise cost for a smaller space.

    Pros:

    • 12,000 BTU capacity is listed for up to 550 square feet.
    • 115V operation offers an alternative to the 230V TCL 14,000 BTU model.
    • Remote, programmable timer, and sleep mode support scheduled comfort.
    • Washable filter with reminder light, dehumidifier, and air ionizer add useful functions.

    Cons:

    • At 75 pounds, installation may require assistance.
    • Listed noise level is 59 dB, higher than the 10,000 BTU Frigidaire’s 56 dB.
    • Listed wattage is 1,220W, above the smaller Frigidaire’s 970W.

    Best for: Households cooling a larger bedroom or living room up to the listed 550-square-foot range that want 115V operation and a filter reminder.

    Not ideal for: Buyers cooling a compact room, prioritizing quieter operation, or needing an easier one-person installation.

    • Cooling capacity:12,000 BTU
    • Listed coverage area:Up to 550 sq. ft.
    • Voltage:115V
    • Wattage:1,220W
    • Noise level:59 dB
    • Dimensions:24 × 21.5 × 14.5 in.
    • Weight:75 lb.
    • Features:Dehumidifier, air ionizer, remote, 24-hour timer, sleep mode, washable mesh filter with reminder
    Our verdict

    “Choose this model over the 10,000 BTU Frigidaire when you need its additional stated coverage and can accept higher listed wattage, noise, and weight.”

    → See it on Amazon →

14. Keystone 8,000 BTU Through-the-Wall Air Conditioner with Supplemental Heat

    

    Best for Smaller Rooms and Shoulder-Season Heat

    View on Amazon

    The Keystone suits a smaller room where supplemental heat is useful but a high-capacity cooling system would be more than the space calls for. It is listed for up to 350 square feet, well below the TCL’s 700-square-foot coverage and the Frigidaire 12,000 BTU model’s 550-square-foot range. That lower capacity is the point for a compact room, while its 4,200 BTU heating function can take the chill off under the specified outdoor-temperature conditions. The remote’s built-in thermostat and display can help place temperature sensing nearer the room’s occupants than a wall-mounted unit. I would not treat that heating capacity as a replacement for central or primary heat. Compared with the cooling-only Frigidaire 10,000 BTU, Keystone adds seasonal flexibility, but gives up cooling headroom.

    Pros:

    • Combines 8,000 BTU cooling with 4,200 BTU supplemental heating.
    • Remote includes a built-in thermostat and LCD screen.
    • Also provides dehumidification and fan circulation.
    • Energy saver, sleep mode, and 24-hour timer support scheduled operation.

    Cons:

    • Supplemental heat is not intended to replace a primary heat source.
    • Heating is specified for outdoor temperatures between 23°F and 76°F.
    • Listed cooling coverage is limited to 350 square feet, below the Frigidaire 10,000 BTU model.

    Best for: People with a room up to 350 square feet who want through-wall cooling and supplemental heat for milder conditions.

    Not ideal for: Buyers needing primary winter heating, cooling for a large open-plan area, or heat operation outside the stated outdoor-temperature range.

    • Cooling capacity:8,000 BTU
    • Supplemental heating capacity:4,200 BTU
    • Listed coverage area:Up to 350 sq. ft.
    • Voltage:115V
    • Moisture removal:Up to 2.1 pints per hour
    • Functions:Cooling, supplemental heating, dehumidification, and fan circulation
    • Heating temperature range:Outdoor temperatures between 23°F and 76°F
    • Controls and timer:Remote with built-in thermostat and LCD screen; 24-hour timer
    Our verdict

    “Choose the Keystone for a smaller room where supplemental heat and a room-sensing remote matter more than broad cooling coverage.”

    → See it on Amazon →

How We Picked

I compared these through-the-wall units as fixed-installation appliances, not as interchangeable window ACs. The ranking considers stated cooling capacity, whether supplemental heat or dehumidification is included, control options such as a remote or smart kit, and the practical impact of 115V versus 230V power. I also weighed how clearly each model serves a distinct need, from modest-room cooling to higher-capacity, multi-season use.

Products rank higher when their feature set offers a useful balance for a broad range of buyers without making the choice depend on an unusual electrical setup or a feature many shoppers may not need. Specialized models still have a place lower in the roundup when their fit is narrower, not because their features are inherently worse. Before buying any unit, I would verify the wall sleeve and opening dimensions, electrical circuit, and installation requirements against the manufacturer’s specifications; product names and BTU figures alone cannot confirm compatibility.

Factors to Consider When Choosing Through The Wall Air Conditioner

A through-the-wall air conditioner is a permanent-install choice, so I would settle the fit and power questions before comparing convenience features. These factors help separate a unit that can cool your room from one that can be installed safely and used comfortably.

Match BTUs to the Room and Its Conditions

Cooling capacity is a starting point, not a guarantee of comfort. Room area, ceiling height, sun exposure, insulation, occupancy, and heat from appliances all affect the load. A unit that is too small may run for long stretches without catching up, while excessive capacity can cool the air quickly without managing humidity as evenly. Use the manufacturer’s room-sizing guidance as a baseline, then account for unusually sunny rooms or open layouts. Avoid choosing the largest BTU number just to be safe; sizing should reflect the space the unit is expected to cool. If several rooms are separated by walls, one through-wall unit may not distribute air well across all of them.

Confirm Voltage and Circuit Capacity Before Ordering

Voltage can narrow the shortlist before any feature comparison begins. Many smaller units in this roundup use 115V, while some higher-capacity models call for 230V; the existing outlet and dedicated circuit must match the unit’s specifications. Do not assume that an available outlet is suitable just because its plug looks close, and do not plan on an adapter to solve a mismatch. Check the breaker, wiring, and installation instructions, and consult a qualified electrician if the circuit details are unclear. A 230V model may make sense when the home is already equipped for it, but adding a circuit can change the project scope. This check can prevent choosing a unit that cannot be connected to the room’s existing electrical service.

Measure the Sleeve, Wall, and Exterior Clearance

Through-the-wall units depend on a correctly sized opening and compatible sleeve, and dimensions can vary between models. Measure the sleeve’s width, height, and depth, then compare those figures with the unit’s installation documentation rather than relying on the listed BTUs or a brand name. Also check wall thickness and whether the unit needs a separate sleeve or other installation parts. Outside, the grille needs room to discharge air, and the installation must protect the wall from water entry. Reusing an existing opening can reduce construction work, but it does not prove that a new model will fit. If measurements fall outside the specified range, plan for modification or choose another model.

Decide Whether Supplemental Heat Meets Your Needs

Heating features can extend a unit’s usefulness during mild weather, but supplemental heat should not be treated as a replacement for a home’s primary heating system. Compare the heating function’s intended use and specifications with your climate, room, and existing heat source. In a room that only needs occasional warmth, the convenience of one installed appliance may matter more than maximum heating output. For cold conditions or whole-home heating, check whether the manufacturer describes the feature as supplemental and plan to retain an appropriate primary system. Heating models may also bring different electrical demands or controls, so check those details alongside BTU capacity. Paying for heat makes less sense if the room already has dependable heating and the feature would rarely be used.

Choose Controls and Moisture Features for How You Use the Room

A remote is useful when the unit sits across the room or high on a wall, while Wi-Fi or a smart kit can help with scheduled or remote adjustments if the controls work with your household’s setup. Those extras do not improve physical fit or replace correct sizing, so I would treat them as convenience features after installation basics are settled. Dehumidification may matter more in a humid bedroom or basement than a smart interface, though buyers should check the unit’s stated moisture-control functions rather than infer performance from the feature name. A fan setting can help circulate air but does not provide the same cooling as compressor operation. Consider who will operate the unit and whether simple controls are preferable to connected features. Choosing features around daily use avoids paying attention to an app while overlooking room comfort.

Plan for Installation, Maintenance, and Noise

Because a through-wall unit passes through the building envelope, installation quality affects drainage, drafts, and the chance of water intrusion. Confirm whether a sleeve, grille, trim, or other components are included, and identify whether the job calls for professional installation. Filter cleaning is a recurring task, so check that the filter is accessible and follow the maker’s care schedule. Noise can matter more in bedrooms and workspaces; compare published sound information where available, and consider fan settings and placement rather than relying on brand reputation. A unit that is simple to maintain may be a better everyday fit than one with extra modes you rarely use. Include installation and electrical work in the overall decision, even though the appliance itself is only one part of the project.

Frequently Asked Questions

Can I put a new through-the-wall air conditioner into the sleeve from my old unit?

Possibly, but a shared brand name or similar BTU rating does not prove that the chassis will fit. Compare the old sleeve’s inside dimensions with the new unit’s installation specifications, including depth and any required clearances. Check whether the new model requires a particular sleeve or grille, since parts may not be interchangeable. Also inspect the existing opening for damage, poor drainage, or gaps that could admit water or outside air. If the dimensions or parts requirements do not match, select a compatible model or plan for a sleeve replacement.

Should I choose a 115V or 230V through-the-wall air conditioner?

Choose based on the electrical service available at the intended installation location and the unit’s exact requirements, not on a general belief that one voltage is always better. This roundup includes 115V choices across several capacities and 230V models among higher-capacity options, so power requirements can narrow the list quickly. A 230V unit may require a dedicated circuit, which can involve electrical work if the room is not already prepared. Have a qualified electrician confirm the circuit and wiring when you are unsure. Do not use an adapter or change a plug to make an incompatible unit appear to fit.

Is a through-the-wall air conditioner with supplemental heat enough for winter?

Usually, supplemental heat is best treated as added warmth for a room or mild conditions, not a substitute for a properly sized primary heating system. Check the product’s heating specifications and the manufacturer’s guidance for the conditions it can serve. A unit that is useful during cool evenings may not keep a room comfortable during sustained cold weather. Also consider insulation, drafts, and whether the room has another heat source. If you need dependable heat through winter, compare the unit’s stated capability with your local climate and retain a suitable primary system.

How do I know what BTU capacity is right for a room with an open layout?

Start with the manufacturer’s room-size guidance, then assess how air moves between the intended cooling area and connected spaces. A through-wall unit cools the room where it is installed most directly; doorways and walls can limit how well it serves adjoining rooms. Account for sunlight, ceiling height, insulation, people, and heat-producing equipment, since these can change the room’s cooling load. Do not add together the square footage of distant rooms and assume a single unit will cool them evenly. For an unusually large or open area, professional load guidance can be more useful than picking the highest capacity in a product list.

Is Wi-Fi worth choosing over a remote for a through-the-wall AC?

Wi-Fi is most useful if you expect to change settings while away, create schedules, or manage the unit through a connected home setup. A remote may be sufficient when you mainly adjust the AC from inside the room, and it avoids depending on an app or network connection for everyday operation. Check whether a smart feature is built in or requires a separate kit, and confirm compatibility with your preferred devices before buying. Neither control type solves a mismatched sleeve, unsuitable voltage, or incorrect capacity. I would choose connectivity only after the unit fits the room and installation.

Conclusion

For the broadest mix of capacity and straightforward operation, I would start with the LG 11,800 BTU with remote as the best overall pick. Buyers focused on value and basic cooling should compare the OLMO 8,000 BTU cooling-only model with the room’s sizing needs; it keeps the feature set simple, though it does not add heat. For a premium, multi-season setup, the OLMO 14,000 BTU AC and heater with built-in smart kit is the standout, provided the space and 230V electrical service suit it. Beginners may prefer a cooling-focused model with a remote and a clear match to an existing sleeve and circuit, rather than paying for smart controls or heating they may not use. For humid rooms, look at the Keystone 10,000 BTU or either Frigidaire dehumidifying option; for supplemental heat at a smaller capacity, compare the Keystone 8,000 BTU with the room and electrical requirements. My final check would be sleeve measurements, voltage, and room sizing—in that order—before choosing among the feature sets.