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10 Best Room Air Conditioners 2026 in the United States
#1
Winner
Senville LETO Series Mini Split Air Conditioner Heat Pump, 12000 BTU 110/120V, Inverter, Works with Alexa, SEER2 20.8, 1 Ton, White
The Senville LETO Series Mini Split Air Conditioner Heat Pump stands out with its impressive 12000 BTU cooling capacity, making it suitable for cooling larger rooms or spaces. Its SEER2 rating of 20.8 indicates high energy efficiency, helping to reduce electricity bills. The integration with Alexa offers convenient smart features, allowing for voice control and remote operation, which is a major plus for tech-savvy users or those seeking modern conveniences.
Rating
10.0
Chosen by1,292
Cooling Capacity (BTUs)
Noise Level
Installation Type
Most important from
7984 reviews
#2
Daikin 24,000 BTU (9K + 9K + 18K) 21SEER2 3-Zone Mini Split Wi-Fi Enabled Air Conditioner Heat Pump R-32 System with Maxwell 15 ft. Installation Kit and Wall Mounting Bracket
The Daikin 24,000 BTU 3-Zone Mini Split System is designed for homeowners who want tailored cooling and heating in multiple rooms without ductwork. With three indoor units (two 9,000 BTU and one 18,000 BTU), it offers flexible comfort control for different spaces, making it ideal for new builds or renovations where traditional HVAC isn’t practical. The system uses R-32 refrigerant and boasts a strong energy efficiency rating (21 SEER2 and 12 EER2), which means it can cool and heat your home effectively while saving on electricity bills. Noise levels are impressively low at just 24 decibels, so it won’t disturb your peace.
Rating
8.5
Noise Level
Cooling Capacity (BTUs)
Installation Type
Most important from
3 reviews
#3
LG LW1823HRSM - Room Air Conditioners with Heating Cooling
The LG LW1823HRSM is a solid choice for anyone needing a window air conditioner that cools and heats medium to large rooms up to 1,000 square feet. Its 18,000 BTU cooling capacity is strong enough to handle living rooms or apartments comfortably. The unit offers decent energy efficiency with a SEER rating of 11.1, which helps keep electricity costs reasonable, though it’s not the highest efficiency available. Noise-wise, this model runs at 57 decibels, which is average for window units and might be noticeable in very quiet rooms but generally won’t be disruptive.
Rating
8.2
Cooling Capacity (BTUs)
Energy Efficiency Ratio (EER)
Noise Level
Most important from
1368 reviews
Top 10 Best Room Air Conditioners 2026 in the United States
#1
Winner
Senville LETO Series Mini Split Air Conditioner Heat Pump, 12000 BTU 110/120V, Inverter, Works with Alexa, SEER2 20.8, 1 Ton, White
Senville LETO Series Mini Split Air Conditioner Heat Pump, 12000 BTU 110/120V, Inverter, Works with Alexa, SEER2 20.8, 1 Ton, White
Cooling Capacity (BTUs): 12000
Installation Type: Professional installation
Smart Features: Alexa Enabled
Chosen by 1292 this week
Daikin 24,000 BTU (9K + 9K + 18K) 21SEER2 3-Zone Mini Split Wi-Fi Enabled Air Conditioner Heat Pump R-32 System with Maxwell 15 ft. Installation Kit and Wall Mounting Bracket
Daikin 24,000 BTU (9K + 9K + 18K) 21SEER2 3-Zone Mini Split Wi-Fi Enabled Air Conditioner Heat Pump R-32 System with Maxwell 15 ft. Installation Kit and Wall Mounting Bracket
Cooling Capacity (BTUs): 23000 British Thermal Units
Energy Efficiency Ratio (EER): 12 EER2
Noise Level: 24 Decibels
Installation Type: Split System
Smart Features: Wi-Fi via Daikin app, Alexa, Google
Filter Type: Titanium Photocatalytic Air-Purifying
LG LW1823HRSM - Room Air Conditioners with Heating Cooling
LG LW1823HRSM - Room Air Conditioners with Heating Cooling
Cooling Capacity (BTUs): 18000
Noise Level: 57 Decibels
Installation Type: Window
Smart Features: WiFi, LG ThinQ, Alexa, Google
Black+Decker 14000 BTU Portable Air Conditioner Unit + 11000 BTU Heater, Remote, LED Display, Window Vent Kit, 4 Caster Wheels, White
Black+Decker 14000 BTU Portable Air Conditioner Unit + 11000 BTU Heater, Remote, LED Display, Window Vent Kit, 4 Caster Wheels, White
Cooling Capacity (BTUs): 14,000 BTU (ASHRAE), 10,000 BTU (DOE)
Noise Level: 54 dB
Installation Type: Portable
Smart Features: Wi-Fi, app control, Alexa, Google Assistant
Related Products
Daikin 12,000 BTU 18 SEER2 Entra R32 Series Ductless Mini Split Heat Pump System w/Maxwell All-Inclusive 15’ Installation Kit and Wall Mounting Bracket (230V), White, RXC12+FTXC12+IKM1438+WAFP24
Daikin 12,000 BTU 18 SEER2 Entra R32 Series Ductless Mini Split Heat Pump System w/Maxwell All-Inclusive 15’ Installation Kit and Wall Mounting Bracket (230V), White, RXC12+FTXC12+IKM1438+WAFP24
Cooling Capacity (BTUs): 12000 BTUs
Energy Efficiency Ratio (EER): 18
Noise Level: 31 dB
Installation Type: Split System
Smart Features: ECO+, Self-Diagnostics
Filter Type: Titanium Apatite Air Filter
Midea 12,000 BTU Smart Inverter Air Conditioner Window Unit with Heat and Dehumidifier – Cools up to 550 Sq. Ft., Energy Star Rated, Quiet Operation, Electronic Controls, Remote Control, White
Midea 12,000 BTU Smart Inverter Air Conditioner Window Unit with Heat and Dehumidifier – Cools up to 550 Sq. Ft., Energy Star Rated, Quiet Operation, Electronic Controls, Remote Control, White
Cooling Capacity (BTUs): 12000 BTUs
Noise Level: 45 dB
Installation Type: Window
Smart Features: WiFi, Remote, Alexa, Google
Filter Type: Washable front filter
BLACK+DECKER Smart Portable Air Conditioner, 14,000 BTU (10,200 BTU SACC) for Rooms up to 700 Sq. Ft., Smart Portable AC with Follow Me Remote and Window Kit, BPACT14WT, White
BLACK+DECKER Smart Portable Air Conditioner, 14,000 BTU (10,200 BTU SACC) for Rooms up to 700 Sq. Ft., Smart Portable AC with Follow Me Remote and Window Kit, BPACT14WT, White
Cooling Capacity (BTUs): 14,000 BTU
Energy Efficiency Ratio (EER): 6.2
Noise Level: 54 dB
Installation Type: portable with window kit
Smart Features: Wi-Fi, app, voice, remote control
Filter Type: washable filter
Midea 12,000 BTU EasyCool Window Air Conditioner, Dehumidifier and Fan - Cool, Circulate and Dehumidify up to 550 Sq. Ft., Reusable Filter, Remote Control
Midea 12,000 BTU EasyCool Window Air Conditioner, Dehumidifier and Fan - Cool, Circulate and Dehumidify up to 550 Sq. Ft., Reusable Filter, Remote Control
Cooling Capacity (BTUs): 12000 BTUs
Energy Efficiency Ratio (EER): 12
Noise Level: 55 dB
Installation Type: Window
Smart Features: None
Filter Type: Reusable filter
#10
BLACK+DECKER Portable Air Conditioner, 10,000 BTU (6,300 BTU SACC) for Rooms up to 450 Sq. Ft., Portable AC with Follow Me Remote Control and Window Kit, BPACT10WT, White
BLACK+DECKER Portable Air Conditioner, 10,000 BTU (6,300 BTU SACC) for Rooms up to 450 Sq. Ft., Portable AC with Follow Me Remote Control and Window Kit, BPACT10WT, White
Cooling Capacity (BTUs): 10,000 BTU
Noise Level: 52 dB
Installation Type: Window kit, portable with wheels
Filter Type: Washable slide-out filter
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Buying Guide for the Best Room Air Conditioners
Choosing the right room air conditioner can make a significant difference in your comfort and energy bills. The key is to find a unit that fits your specific needs and the size of the room you want to cool. Here are some important specifications to consider when selecting a room air conditioner.Cooling Capacity (BTUs)Cooling capacity, measured in British Thermal Units (BTUs), indicates how much heat an air conditioner can remove from a room per hour. This is crucial because an air conditioner with too low a BTU rating will struggle to cool the room, while one with too high a BTU rating will cool the room too quickly without removing enough humidity, leading to a clammy feeling. To navigate this, consider the size of your room: for a small room (100-300 sq. ft.), 5,000-7,000 BTUs is usually sufficient; for a medium room (300-500 sq. ft.), 8,000-12,000 BTUs is appropriate; and for a large room (500-800 sq. ft.), 14,000-18,000 BTUs may be needed. Match the BTU rating to your room size for optimal comfort.
Energy Efficiency Ratio (EER)The Energy Efficiency Ratio (EER) measures how efficiently an air conditioner uses energy to cool a room. A higher EER means better energy efficiency, which can lead to lower electricity bills. EER is calculated by dividing the BTUs by the power consumption in watts. Look for units with an EER of 10 or higher for good efficiency. If you prioritize energy savings and environmental impact, choose a model with a higher EER.
Noise LevelNoise level is an important consideration, especially if the air conditioner will be used in a bedroom or living area. Noise levels are measured in decibels (dB). Units with a noise level of 50 dB or lower are considered quiet and are suitable for bedrooms. For living rooms or other areas where noise is less of a concern, units with noise levels up to 60 dB may be acceptable. Consider where you will place the air conditioner and choose a noise level that will not disrupt your activities or sleep.
Installation TypeRoom air conditioners come in different installation types, including window-mounted, wall-mounted, and portable units. Window-mounted units are the most common and are easy to install in a standard window frame. Wall-mounted units require a more permanent installation but do not obstruct the window. Portable units can be moved from room to room but require a venting kit to expel hot air. Choose the installation type that best fits your living situation and preferences.
Smart FeaturesMany modern air conditioners come with smart features such as Wi-Fi connectivity, remote control, and programmable timers. These features allow you to control the unit remotely, set schedules, and optimize energy use. If you value convenience and want to integrate your air conditioner with other smart home devices, look for models with these advanced features. However, if you prefer simplicity, a basic model without smart features may be sufficient.
Filter TypeThe type of filter used in an air conditioner affects air quality and maintenance. Washable and reusable filters are cost-effective and environmentally friendly, as they can be cleaned and reused multiple times. Disposable filters need to be replaced regularly but may offer better filtration for allergens and dust. If you have allergies or respiratory issues, consider a unit with a high-quality filter that can capture fine particles. Otherwise, a washable filter may be more convenient and economical.