10 Best air conditioner and heater window units of 2026

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Keystone
Keystone Energy Star 12,000 BTU Window Mounted Inverter Air Conditioner with Supplemental Heat, Quiet High Efficiency Window AC Unit with Remote for Apartment, Medium-Large Rooms up to 550-Sq.Ft.

10% Off
Main highlights

Key Features
12,000 BTU cooling, 10,000 BTU heating, inverter tech for energy efficiency, and quieter operation. Features washable filter with alert for easy maintenance.

Ideal Use Cases
Best for rooms up to 550 sq. ft., in climates with temperatures between 41-75 degrees for supplemental heating. Perfect for energy-conscious households.

Customer Praise
Most reviews highlight its quiet operation as a standout feature, appreciating the significant noise reduction compared to traditional units.
Key specs
- floor area:550 Square Feet
- installation:Easy to Install
- special features:Inverter Technology
- voltage:115 Volts
- BTU:N/A
9.6

Exceptional

Our Rating

9.3
Easy installation

9.3
Remote Control

9.3
Noise level
How do we rank?

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Value for Money

2

LG

LG 12,200 BTU Window Air Conditioner with Supplemental Heat, 230/208V, Cools 570 Sq.Ft. (19' x 30' Room Size), Electronic Controls with Remote, 2 Cooling, Heating & Fan Speeds, Slide In-Out Chassis

22% Off
9.5

Excellent

Our Rating
3

ROVSUN
ROVSUN 8000 BTU Air Conditioner Window Unit with Heat, 4-in-1 Window AC Unit Cooler, Heater, Dehumidifier & Fan with Timer, Remote Control & Installation Kit for Rooms up to 350 Sq. Ft, 115V/60Hz
Main highlights

Versatile AC and Heater
The ROVSUN unit offers 8,000 BTU cooling and 4,000 BTU heating, ideal for rooms up to 350 sq. ft.

Perfect for Compact Spaces
Designed for homes, offices, or apartments needing efficient temperature control.

Highly Rated Performance
Customers praise its exceptional cooling performance and reliability in high temperatures.
Key specs
- floor area:350 Square Feet
- installation:Window
- special features:Remote control
- voltage:115 Volts
- BTU:N/A
9.3

Excellent

Our Rating
4

ROVSUN
ROVSUN 8000 BTU Air Conditioner Window Unit with Heat, 4-in-1 Window AC Unit Cooler, Heater, Dehumidifier & Fan with Timer, Remote Control & Installation Kit for Rooms up to 350 Sq. Ft, 115V/60Hz
Main highlights

Versatile AC and Heater
The ROVSUN unit offers 8,000 BTU cooling and 4,000 BTU heating, ideal for rooms up to 350 sq. ft.

Perfect for Compact Spaces
Designed for homes, offices, or apartments needing efficient temperature control.

Highly Rated Performance
Customers praise its exceptional cooling performance and reliability in high temperatures.
Key specs
- floor area:350 Square Feet
- installation:Window
- special features:Remote control
- voltage:115 Volts
- BTU:N/A
9.1

Excellent

Our Rating
5

Midea
Midea 8,000 BTU Smart Inverter Air Conditioner Window Unit with Heat and Dehumidifier – Cools up to 350 Sq. Ft., Energy Star Rated, Quiet Operation, Electronic Controls, Remote Control, White

10% Off
Main highlights

Efficient Cooling and Heating
The Midea 8000 BTU unit provides cooling and supplemental heating, ideal for year-round use in rooms up to 350 sq. ft.

Perfect for Large Rooms
Designed for spaces up to 350 square feet, this unit is ideal for bedrooms, apartments, or small offices.

Praised Quiet Performance
Customers appreciate its ultra-low noise level of 45 dB, making it suitable for quiet environments.
Key specs
- floor area:350 Square Feet
- installation:Window
- special features:Inverter Compressor, Remote Controlled, WiFi Enabled, Heating And Cooling Function, Dehumidifier
- voltage:115 Volts
- BTU:N/A
9.0

Excellent

Our Rating

8.9
Efficient Energy Use

8.9
Remote Control

8.9
Noise level
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6

ROVSUN
ROVSUN 8000 BTU Window Air Conditioner with Heat, Window AC Unit & Heater Combo with APP & Voice Smart Control, Timer Function & Easy Installation Kit, Work with Alexa/Google Assistant, 115V/60Hz
Main highlights

All-Season Climate Control
8000BTU cooling and 4000BTU heating for rooms up to 350 sq ft.

Versatile Home Use
Ideal for home, office, or apartment climate management.

Smart Connectivity
WIFI-enabled, works with Alexa/Google Assistant for seamless control.
Key specs
- floor area:350 Square Feet
- installation:Window
- special features:Remote control
- voltage:115 Volts
- BTU:N/A
8.8

Very Good

Our Rating
7

Midea
Midea Inverter Window Air Conditioner with Heat – Quiet Window AC Unit and Heat Combo with Dehumidifier – Cools up to 550 Sq. Ft. – Energy Star Rated, Smart Control, Remote, 12,000 BTU
Main highlights

Multi season heating and cooling for year round comfort
This unit provides efficient air conditioning, heating, and dehumidification in spaces up to 550 sq. ft., with smart controls and ultra-quiet operation.

Versatile for bedrooms, apartments, and large rooms
Best suited for larger rooms or apartments, especially when year-round climate control and quiet performance are important.

Customers praise quiet operation and easy smart controls
Users consistently commend the low noise levels and the convenience of adjusting settings via app, remote, or voice.
8.7

Very Good

Our Rating
8

Keystone
Keystone 12,000 BTU Window Air Conditioner with 11,000 BTU Supplemental Heating and Dehumidification, 230V, Window AC Unit for Living Room, Apartment, Medium Sized Rooms up to 550 Sq.Ft.

10% Off
Main highlights

Powerful Cooling and Heating
12,000 BTU cooling and 11,000 BTU heating for large spaces.

Year-round Comfort
Ideal for large rooms up to 550 Sq.Ft., perfect for living rooms and apartments.

Great Value and Size
Praised for its size, value, and coverage area.
Key specs
- floor area:550 Square Feet
- installation:Window installation kit included
- special features:Supplemental heating, dehumidification
- voltage:230 Volts
- BTU:N/A
8.4

Good

Our Rating

8.0
Remote Control

8.0
Efficient Energy Use

8.0
Easy installation
9

ROVSUN

ROVSUN 12000 BTU Air Conditioner Window Unit with Heat, 4-in-1 Window AC Unit Cooler, Heater, Dehumidifier & Fan with Timer, Remote Control & Installation Kit for Rooms up to 550 Sq. Ft, 208/230V
8.2

Good

Our Rating
10

ROVSUN

ROVSUN 12000 BTU Air Conditioner Window Unit with Heat, 4-in-1 Window AC Unit Cooler, Heater, Dehumidifier & Fan with Timer, Remote Control & Installation Kit for Rooms up to 550 Sq. Ft, 208/230V
8.0

Good

Our Rating

10 Best air conditioner and heater window units of 2026

1

Keystone Energy Star 12,000 BTU Window Mounted Inverter Air Conditioner with Supplemental Heat, Quiet High Efficiency Window AC Unit with Remote for Apartment, Medium-Large Rooms up to 550-Sq.Ft.

9.3

9.3

9.3

How do we rank?

How do we rank?

Analyzing top stores

2

LG 12,200 BTU Window Air Conditioner with Supplemental Heat, 230/208V, Cools 570 Sq.Ft. (19' x 30' Room Size), Electronic Controls with Remote, 2 Cooling, Heating & Fan Speeds, Slide In-Out Chassis

3

ROVSUN 8000 BTU Air Conditioner Window Unit with Heat, 4-in-1 Window AC Unit Cooler, Heater, Dehumidifier & Fan with Timer, Remote Control & Installation Kit for Rooms up to 350 Sq. Ft, 115V/60Hz

4

ROVSUN 8000 BTU Air Conditioner Window Unit with Heat, 4-in-1 Window AC Unit Cooler, Heater, Dehumidifier & Fan with Timer, Remote Control & Installation Kit for Rooms up to 350 Sq. Ft, 115V/60Hz

5

Midea 8,000 BTU Smart Inverter Air Conditioner Window Unit with Heat and Dehumidifier – Cools up to 350 Sq. Ft., Energy Star Rated, Quiet Operation, Electronic Controls, Remote Control, White

8.9

8.9

8.9

6

ROVSUN 8000 BTU Window Air Conditioner with Heat, Window AC Unit & Heater Combo with APP & Voice Smart Control, Timer Function & Easy Installation Kit, Work with Alexa/Google Assistant, 115V/60Hz

7

Midea Inverter Window Air Conditioner with Heat – Quiet Window AC Unit and Heat Combo with Dehumidifier – Cools up to 550 Sq. Ft. – Energy Star Rated, Smart Control, Remote, 12,000 BTU

8

Keystone 12,000 BTU Window Air Conditioner with 11,000 BTU Supplemental Heating and Dehumidification, 230V, Window AC Unit for Living Room, Apartment, Medium Sized Rooms up to 550 Sq.Ft.

8.0

8.0

8.0

9

ROVSUN 12000 BTU Air Conditioner Window Unit with Heat, 4-in-1 Window AC Unit Cooler, Heater, Dehumidifier & Fan with Timer, Remote Control & Installation Kit for Rooms up to 550 Sq. Ft, 208/230V

10

ROVSUN 12000 BTU Air Conditioner Window Unit with Heat, 4-in-1 Window AC Unit Cooler, Heater, Dehumidifier & Fan with Timer, Remote Control & Installation Kit for Rooms up to 550 Sq. Ft, 208/230V

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