Are you tired of sacrificing precious window space or dealing with bulky portable units just to stay cool? If you’re looking for a reliable, efficient, and aesthetically pleasing cooling solution, a through the wall air conditioner might be just what you need. These units offer a permanent, space-saving way to keep your rooms comfortable, often providing more powerful and consistent cooling than their window-mounted counterparts.
When it comes to quality and performance in this category, Keystone is a name that frequently pops up, known for its robust and feature-rich models. However, there are several other fantastic options on the market that deserve your attention. We’ve done the legwork to bring you a comprehensive review of the 10 best options, including standout through the wall Keystone air conditioner units and some excellent alternatives. Let’s dive in and find the perfect fit for your home!
1. Keystone 12,000 BTU Wall Mounted Air Conditioner with Supplemental Heat
This Keystone unit is a fantastic all-rounder for anyone needing both cooling and a little extra warmth during cooler months. It’s designed to efficiently handle small to medium rooms up to 550 sq. ft., making it a versatile choice for bedrooms, offices, or living areas. What truly sets it apart is its supplemental heating capacity, which extends its utility beyond just the summer, providing comfort year-round without needing a separate heater.
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Key Features:
- 12,000 BTU cooling / 10,600 BTU supplemental heating capacity
- Ideal for rooms up to 550 sq. ft.
- Cooling, supplemental heating, dehumidification, and fan modes
- Space-saving design, preserves window view
- Requires 230-volt/20-amp electrical outlet
- Smart remote control with ‘I Sense’ technology for accurate temperature readings
- Energy Saver and Sleep modes for reduced electricity consumption
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Pros:
- Dual-purpose functionality (cooling & supplemental heat)
- Covers a good room size
- Smart remote enhances comfort and efficiency
- Energy-saving features help reduce utility bills
- Clean, wall-mounted installation frees up windows
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Cons:
- Supplemental heat isn’t a primary heat source
- Requires a specific 230V/20A electrical outlet, which might necessitate professional installation
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User Impressions: Users love the convenience of having both cooling and supplemental heat in one unit, praising its ability to effectively cool rooms. The smart remote is frequently highlighted as a major plus for maintaining ideal comfort levels. While the 230V requirement is noted, the overall performance makes it a worthwhile investment for those needing year-round temperature control.
2. Keystone 14,000 BTU 230V Wall Mounted Air Conditioner & Dehumidifier
For larger spaces that demand serious cooling power, this 14,000 BTU Keystone model steps up to the plate. It’s specifically engineered to tackle rooms up to 700 square feet, making it perfect for spacious living rooms, open-plan apartments, or larger master bedrooms. Beyond its impressive cooling, its robust dehumidification capability is a blessing in humid climates, ensuring your space feels fresh and comfortable, not just cool.
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Key Features:
- 14,000 BTU cooling capacity for rooms up to 700 sq. ft.
- 3 cooling modes, 3 fan speeds, 4-way adjustable air louvers
- Removes 2.9 pints of moisture per hour (dehumidification)
- Space-saving design with easy installation via standard universal interior trim kit
- Requires a 230-volt/20-amp electrical outlet
- Smart remote control with ‘I Sense’ technology
- Energy Saver and Sleep modes for efficiency
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Pros:
- Excellent cooling capacity for large rooms
- Superior dehumidification performance
- Flexible cooling options with multiple modes and fan speeds
- Smart remote adds convenience
- Energy-efficient operation helps save money
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Cons:
- No heating function, cool-only unit
- Requires a dedicated 230V/20A outlet
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User Impressions: Customers often remark on this unit’s sheer power and its ability to quickly cool down large areas, even during intense heatwaves. The effective dehumidification is a frequently praised feature, contributing to a much more comfortable environment. Its quiet operation and smart remote make it a user-friendly choice for enduring summer heat.
3. Keystone 10,000 BTU Through the Wall Air Conditioner and Dehumidifier (115V)
This 10,000 BTU through the wall Keystone air conditioner is a fantastic option for those seeking efficient cooling for medium-sized rooms (up to 450 sq. ft.) without the need for a specialized 230V outlet. Its 115V compatibility means it can plug into a standard household outlet, simplifying installation for many homeowners. It delivers reliable cooling and effective dehumidification, making it a powerful yet convenient choice.
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Key Features:
- 10,000 BTU cooling capacity for rooms up to 450 sq. ft.
- 3 cooling modes, 3 fan speeds, 4-way adjustable air louvers
- Removes 2.3 pints of moisture per hour
- 115V compatibility (standard electrical outlet)
- Space-saving design with universal interior trim kit
- Smart remote control with ‘I Sense’ technology
- Energy Saver and Sleep modes for cost-effective cooling
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Pros:
- Plugs into standard 115V outlet, easier installation
- Strong cooling and dehumidification for its BTU class
- Flexible comfort settings with multiple modes and speeds
- Energy-saving features included
- Preserves window views
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Cons:
- Not suitable for very large rooms (over 450 sq. ft.)
- No heating function
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User Impressions: Reviewers appreciate the ease of installation due to its 115V plug, noting it’s a significant advantage. They find the unit cools efficiently and quietly, providing consistent comfort. The smart remote control is a definite highlight, making temperature management a breeze.
4. Keystone 26 In. Metal Wall Sleeve for Wall Mounted AC Units
While not an air conditioner itself, this Keystone wall sleeve is an absolutely crucial component for installing many through-the-wall AC units. Designed for durability and universal compatibility, it provides the necessary structural support and insulation for your AC. This metal sleeve isn’t just a casing; it’s an investment in the longevity and efficiency of your through-the-wall AC, protecting it from elements and ensuring a snug fit.
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Key Features:
- Compatible with all 26-inch wide through-the-wall air conditioner units
- Sturdy and durable all-metal construction
- Blocks bugs, dust, and debris
- Provides extra insulation for improved efficiency
- Helps bear the weight of the air conditioner
- Withstands inclement weather and corrosion
- Dimensions: 17.5″L x 25.5″W x 15.25″H
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Pros:
- Essential for proper through-the-wall AC installation
- Universal 26-inch compatibility (check specific models)
- Enhances AC efficiency through insulation
- Protects the unit from external elements and pests
- Robust metal construction ensures long-term durability
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Cons:
- An additional purchase required for AC unit installation
- Only compatible with 26-inch wide units
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User Impressions: Customers purchasing this sleeve consistently emphasize its solid construction and perfect fit for compatible Keystone units. They highlight its importance in providing a clean, secure, and weather-resistant installation, noting that it simplifies the overall AC setup process significantly.
5. Keystone 10,000 BTU Through the Wall Air Conditioner and Dehumidifier (230V)
This is another 10,000 BTU through the wall Keystone air conditioner, but with a crucial difference: it runs on 230V. While it requires a specific outlet, this voltage often translates to greater energy efficiency and potentially more robust performance over time compared to 115V models of similar BTU. It’s a powerhouse for rooms up to 450 sq. ft., delivering powerful cooling and effective moisture removal.
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Key Features:
- 10,000 BTU cooling capacity for rooms up to 450 sq. ft.
- 3 cooling modes, 3 fan speeds, 4-way adjustable air louvers
- Removes 2.3 pints of moisture per hour
- 230V compatibility (requires special outlet)
- Space-saving design with universal interior trim kit
- Smart remote control with ‘I Sense’ technology
- Energy Saver and Sleep modes for efficiency
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Pros:
- Potentially more energy-efficient operation due to 230V
- Strong and consistent cooling for medium-sized rooms
- Excellent dehumidification capabilities
- Smart remote control for convenient operation
- Space-saving and aesthetic design
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Cons:
- Requires a dedicated 230V electrical outlet
- No heating function
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User Impressions: Users who have the necessary 230V outlet find this unit to be incredibly effective, noting its powerful cooling and quiet operation. They often mention that the unit quickly brings down room temperatures and maintains them consistently, making it a reliable choice for hot climates.
6. LG LT1016CER 9,800 BTU 115V Remote Control Through-The-Wall Air Conditioner
Stepping away from Keystone for a moment, the LG LT1016CER offers a powerful alternative for through-the-wall cooling. This 9,800 BTU unit is an Energy Star certified option, promising efficient operation for rooms up to 450 sq. ft. Its focus on quiet performance and user-friendly features like multiple fan speeds and an easy-clean filter makes it a strong contender for those prioritizing efficiency and convenience from a trusted brand.
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Key Features:
- 9,800 BTUs cools rooms up to 450 sq. ft.
- Energy Star certified (10.6 EER)
- 115V operation
- 3 cooling speeds/3 fan speeds
- Easy-clean mesh filter with clean filter alert
- Remote control included
- Designed for through-the-wall installation (not for windows)
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Pros:
- Energy Star efficiency means lower running costs
- Reliable cooling performance from a reputable brand
- Standard 115V plug for easier electrical setup
- Easy-clean filter maintains air quality and unit efficiency
- Multiple fan speeds offer greater control over comfort
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Cons:
- Slightly lower BTU than some comparable models
- No heating or dehumidification specific mode beyond standard cooling
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User Impressions: Customers praise the LG unit for its quiet operation and efficient cooling, often highlighting its Energy Star rating as a key selling point. The ease of filter cleaning is also a much-appreciated feature, contributing to less maintenance and better air quality.
7. Keystone 8,000 BTU Window and Wall Air Conditioner with Supplemental Heat
This 8,000 BTU Keystone unit offers remarkable versatility, functioning as both a window and a through-the-wall air conditioner. It’s a great choice for smaller spaces up to 350 sq. ft. that might need the flexibility of different installation types. Similar to its larger sibling, it also includes supplemental heating, making it a valuable asset for year-round comfort in compact rooms, apartments, or even workshops.
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Key Features:
- 8,000 BTU cooling / 3,500 BTU supplemental heating capacity
- Ideal for spaces up to 350 sq. ft.
- Functions as both a window unit and a through-the-wall AC
- Supplemental heating for temperatures between 23-76 degrees Fahrenheit
- ‘I Sense’ remote control for accurate temperature readings
- Energy Saver and Sleep modes
- Window installation kit included
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Pros:
- Highly versatile: window or wall installation
- Dual functionality: cooling and supplemental heat
- Compact and suitable for smaller rooms
- Energy-saving features for budget-conscious operation
- Smart remote enhances user experience
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Cons:
- Lower BTU means it’s only suitable for smaller rooms
- Supplemental heat is not for primary heating
- While it can be wall-mounted, it’s primarily marketed as a window unit first.
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User Impressions: Users appreciate the flexibility of installation, especially for rental properties or rooms that might change function. Its ability to provide both cooling and a touch of heat makes it a practical, space-saving solution for year-round comfort in smaller areas.
8. ROVSUN 8000 BTU Through the Wall Air Conditioner with Heat
The ROVSUN 8000 BTU unit is a true climate control workhorse, offering both powerful cooling and heating in one package. Perfect for spaces up to 350 sq. ft., it’s an excellent choice for bedrooms, offices, or studio apartments where a comprehensive solution is desired. With its intuitive LED control panel, remote, and multiple modes, it ensures optimal comfort no matter the season.
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Key Features:
- 8,000 BTU cooling and heating capacity for up to 350 sq. ft.
- Dual control: LED panel and remote control
- 4 versatile modes: Cool/Heat/Fan/Dry
- 3 adjustable fan speeds and a 24-hour timer
- Easy-clean removable front-panel filter
- Quick DIY installation, fits standard 25.5″ wall sleeves (sleeve not included)
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Pros:
- True dual-purpose unit (cooling and heating)
- Comprehensive climate control with 4 modes
- Easy to clean and maintain filter
- Designed for quick DIY installation
- Fits common wall sleeve sizes
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Cons:
- Wall sleeve is not included, requiring an additional purchase
- 8,000 BTU is only suitable for small to medium rooms
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User Impressions: Customers often highlight the ROVSUN’s genuine heating capability, differentiating it from units with only supplemental heat. They find it reliable for keeping smaller rooms comfortable throughout the year, praising its easy maintenance and straightforward controls.
9. Whirlpool 8,000 BTU Through the Wall Air Conditioner, 115V
Whirlpool delivers a solid 8,000 BTU through-the-wall air conditioner that’s all about customizable cooling and convenience. Ideal for spaces up to 350 sq. ft., this 115V unit is designed to fit a wide range of existing wall sleeves, making it a great replacement option. Its 8-way directional louvers and various modes allow you to pinpoint your comfort precisely, while Eco and Sleep functions help manage energy consumption.
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Key Features:
- 8,000 BTU cooling capacity for rooms up to 350 sq. ft.
- 115V operation with 5.9-ft LCDI 3-prong plug
- 8-way directional louvers, 3 fan speeds, 4 operation modes
- Temperature setting range of 62-86 degrees
- Universal fit for sleeves 24.5”-27” wide (trim kit and rear grille included)
- Eco and Sleep functions, programmable 24-hour timer
- Quick-access filter for easy cleaning
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Pros:
- Flexible airflow customization with 8-way louvers
- Universal fit for many existing wall sleeves
- Energy-saving modes (Eco, Sleep) and programmable timer
- Easy filter access for simple maintenance
- Standard 115V plug for ease of use
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Cons:
- 8,000 BTU limits it to smaller room sizes
- No heating function
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User Impressions: Users frequently commend the Whirlpool unit for its quiet operation and the ability to direct airflow exactly where it’s needed. The universal fit is a significant advantage for those replacing an old unit, and the energy-saving features are often mentioned positively.
10. Durastar DRWTCSLV Through-the-Wall Air Conditioner Wall Sleeve
Just like the Keystone wall sleeve, the Durastar DRWTCSLV is a vital accessory for anyone installing a through-the-wall AC unit. This wall sleeve is designed to securely house Durastar ACs, but its dimensions make it compatible with most other brands of through-the-wall units as well. It provides the necessary structural support, insulation, and protection, ensuring your air conditioner performs optimally and lasts longer.
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Key Features:
- Fits Durastar through-the-wall window air conditioners
- Can accommodate most other brands of through-the-wall ACs
- Dimensions: 15 1/4″ H x 25 1/2″ W x 17 1/2″ D
- Provides secure housing and protection
- Essential for proper installation
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Pros:
- Broad compatibility with various AC brands
- Robust construction for secure AC mounting
- Offers protection and insulation for the AC unit
- Crucial for proper through-the-wall AC installation
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Cons:
- An additional purchase; not an AC unit itself
- Requires precise measurement for AC compatibility
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User Impressions: Customers find the Durastar wall sleeve to be a sturdy and reliable choice for mounting their through-the-wall ACs. Its compatibility with various brands is a definite plus, simplifying the installation process and providing peace of mind for long-term unit stability.
Frequently Asked Questions (FAQ)
Q: What is a through the wall air conditioner?
A: A through-the-wall air conditioner is a cooling unit designed to be permanently installed in a specially cut opening in an exterior wall, rather than in a window. This setup allows you to keep your windows clear and provides a more stable and often more efficient cooling solution for specific rooms.
Q: What’s the difference between a through the wall and a window air conditioner?
A: The main difference is installation. Window units sit in your window opening and typically have vents on the sides and back. Through-the-wall units are installed flush with an exterior wall opening, using a wall sleeve for support. They generally have vents on the front and back, making them unsuitable for window installation. Through-the-wall units often offer a cleaner, more permanent look and don’t block your window view.
Q: How do I choose the right BTU for my room?
A: BTU (British Thermal Unit) determines the cooling power. A general guideline is:
– 8,000 BTU: up to 350 sq. ft.
– 10,000 BTU: up to 450 sq. ft.
– 12,000 BTU: up to 550 sq. ft.
– 14,000 BTU: up to 700 sq. ft.
Consider factors like ceiling height, direct sunlight exposure, and the number of windows when making your final decision.
Q: Do through the wall AC units require a special electrical outlet?
A: Many powerful through-the-wall AC units, especially those 12,000 BTU and above, require a 230-volt/20-amp electrical outlet. Smaller units (8,000-10,000 BTU) may operate on standard 115-volt outlets. Always check the product specifications and consult with an electrician if you’re unsure about your home’s electrical capacity.
Q: Is a wall sleeve necessary for a through the wall air conditioner?
A: Yes, absolutely! A wall sleeve is essential for proper installation. It provides structural support for the unit, insulates against heat loss/gain, and protects the AC from pests and weather elements. Most through-the-wall ACs require a compatible wall sleeve, which is often sold separately.
Q: Can a through the wall AC unit provide heat as well?
A: Many through-the-wall AC units offer “supplemental heat” or full “heat pump” functionality. Supplemental heat is designed to take the chill out of a room when temperatures are moderately cool (e.g., 23-76°F) but isn’t meant as a primary heat source. Units with full heat pump capabilities can often provide more substantial heating. Always check the specific product description to understand its heating capabilities.
Q: How do I maintain my through the wall air conditioner?
A: Regular maintenance includes cleaning or replacing the air filter (usually monthly during heavy use), keeping the front grille free of obstructions, and periodically cleaning the condenser coils (the outdoor part) to ensure efficient operation. For best results, follow the manufacturer’s specific cleaning instructions.
Conclusion
Choosing the right through the wall air conditioner can significantly enhance your home comfort, providing powerful, discreet cooling without hogging your windows. Whether you’re leaning towards a reliable through the wall Keystone air conditioner for its proven performance and dual-functionality, or exploring other top brands like LG, ROVSUN, or Whirlpool for their specific features and efficiencies, there’s a perfect unit out there for your needs.
Remember to consider your room size, electrical requirements, and whether you need supplemental heating when making your choice. Don’t forget the all-important wall sleeve for a secure and efficient installation! Invest wisely, and you’ll be enjoying cool, comfortable living for years to come.