Choosing the right quiet through the wall air conditioner can significantly improve your indoor comfort without the noise and inconvenience of traditional window units. Through-the-wall ACs are ideal for apartments, bedrooms, and living rooms, offering efficient cooling with discreet installation. Below is a summary of top-rated units selected for their quiet operation, cooling capacity, and smart features to suit various room sizes.
Product | Brand | Cooling Capacity | Room Size | Special Features |
---|---|---|---|---|
LG 10,000 BTU Through the Wall AC | LG | 9,800 BTU | up to 440 sq. ft. | Energy efficient R-32 refrigerant, turbo fan, 4-way air deflection |
TCL H12T9E1-A 12,000 Smart AC | TCL | 12,000 BTU | up to 550 sq. ft. | Built-in dehumidifier, Alexa & Google Assistant compatible |
OLMO TTW 12,000 BTU 230V Cool Only AC | OLMO | 12,000 BTU | Residential & commercial use | R-32 refrigerant, smart kit, remote included |
BLACK+DECKER 18,000 BTU Window/Through Wall AC | BLACK+DECKER | 18,000 BTU | up to 1,000 sq. ft. | Remote control, 3 cooling speeds, fan only mode |
OLMO 12,000 BTU 115V Cool Only AC with Sleeve | OLMO | 12,000 BTU | Residential & commercial use | R-32 refrigerant, built-in smart kit, wall sleeve included |
LG 10,000 BTU Through the Wall Air Conditioner

This LG through-the-wall air conditioner offers 9,800 BTU cooling power, perfectly suited for rooms up to 440 square feet such as bedrooms and apartments. It uses R-32 refrigerant, known for high efficiency and environmental safety, delivering an EER of 10.7 for energy-efficient operation. The unit includes 3 cooling speeds and modes like Energy Saver and Dry Mode, which reduces humidity by up to 2.9 pints per hour. The 4-way air deflection allows users to direct airflow for maximum comfort. Designed specifically for through-wall installation, this quiet air conditioner supports consistent cooling performance while operating efficiently.
TCL H12T9E1-A 12,000 Smart Through-The-Wall Air Conditioner

The TCL H12T9E1-A combines powerful 12,000 BTU cooling for spaces up to 550 square feet with smart home capabilities. Its built-in dehumidifier mode helps reduce moisture and odors, improving indoor air quality during humid months. Users can control the AC via remote or voice commands through Alexa and Google Assistant, adding convenience to temperature adjustments. This model also offers multiple fan speeds and modes tailored to medium-sized rooms including living rooms, bedrooms, or offices. Its quiet operation and wall-mounted design make it a versatile and modern cooling solution.
OLMO TTW 12,000 BTU 230V Through-The-Wall Air Conditioner

This OLMO 12,000 BTU through-the-wall air conditioner is designed for 230V power supply and uses eco-friendly R-32 refrigerant. It offers reliable cooling suited for residential, commercial, and hotel applications. The unit comes with a remote control and a built-in smart kit for wireless operation. Note that the wall sleeve is not included and must be separately purchased. Its cooling-only functionality supports consistent temperature control, making it ideal for users looking for an efficient, medium-capacity wall unit with smart connectivity options.
BLACK+DECKER 18,000 BTU Window or Through The Wall Air Conditioner

The BLACK+DECKER 18,000 BTU unit is one of the most powerful options, capable of cooling up to 1,000 square feet. It offers three cooling speeds plus a fan-only mode, making it flexible for various temperature needs. The full-function remote control provides convenient operation for settings including sleep mode, energy saver, and 24-hour timer. Designed for window or through-the-wall installation, this unit is suitable for larger rooms, offices, or whole floors. Despite its high capacity, it maintains quiet operation for minimal disturbance.
OLMO 12,000 BTU 115V Through-The-Wall Air Conditioner with Wall Sleeve

This OLMO 12,000 BTU wall air conditioner is optimized for a 115V power supply and includes a wall sleeve for easy installation convenience. It uses R-32 refrigerant and has a built-in wireless smart kit allowing remote operation. Its cooling-only design is suitable for residential or commercial use in medium-sized rooms. The included sleeve simplifies mounting and weatherproofing through-the-wall setups, making this model an all-in-one package for efficient cooling with smart controls and quiet performance.
Buying Guide for Quiet Through-The-Wall Air Conditioners
When selecting a quiet through-the-wall air conditioner, consider the following key factors:
- Cooling Capacity (BTU): Choose an AC with BTU ratings appropriate for your room size. Undersized units will struggle to cool, while oversized units may cycle too frequently and waste energy.
- Noise Level: Look for models specifically noted for quiet operation. Features like efficient fans and compressor technology help reduce noise.
- Installation Type: Confirm the unit is designed for through-the-wall installation rather than window use. Some require separately purchased wall sleeves.
- Energy Efficiency: Refrigerants like R-32 and higher Energy Efficiency Ratios (EER) improve operating costs and reduce environmental impact.
- Additional Functions: Modes such as energy saver, dry (dehumidification), and fan-only add versatility. Remote controls and smart features (Alexa/Google Assistant compatibility) enhance convenience.
- Voltage Compatibility: Check your home’s voltage (115V or 230V) to ensure compatibility with the AC unit’s power requirements before purchasing.
- Maintenance Features: Washable filters and easy-to-access components simplify routine upkeep and prolong the unit’s lifespan.
Comparing units across these criteria will help you choose a quiet through-the-wall air conditioner that meets your cooling needs, fits your space, and operates efficiently with minimal noise disruption.