Best Most Energy Efficient Window Air Conditioner in 2025

Updated on July 2025
#1
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  • Ultra-Quiet operation with WhisperTech technology, silencing the unit by 9X compared to traditional air conditioners, making it ideal for restful sleep.
  • Pre-assembled installation kit allows for easy setup straight out of the box with a straightforward guide for quick assembly.
  • Efficient cooling with a 45-degree airflow angle, enhancing comfort without blowing air directly in your face, and utilizes eco-friendly R32 refrigerant.
  • Smart home integration enables remote control via smartphone app and voice commands, allowing for convenient temperature management from anywhere.
  • Combines modern design with 60 years of air conditioning expertise, focused on delivering high-quality indoor air and enhancing urban living.
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  • Ultra-Quiet operation with WhisperTech technology, silencing the unit by 9X compared to traditional air conditioners, making it ideal for restful sleep.
  • Pre-assembled installation kit allows for easy setup straight out of the box with a straightforward guide for quick assembly.
  • Efficient cooling with a 45-degree airflow angle, enhancing comfort without blowing air directly in your face, and utilizes eco-friendly R32 refrigerant.
  • Smart home integration enables remote control via smartphone app and voice commands, allowing for convenient temperature management from anywhere.
  • Combines modern design with 60 years of air conditioning expertise, focused on delivering high-quality indoor air and enhancing urban living.
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#2
Value for Money
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  • WhisperTech technology makes this 10000 BTU window air conditioner 9 times quieter than traditional units, enhancing sleep comfort in spaces up to 450 sq ft.
  • The air conditioner comes with a pre-assembled installation kit and an easy-to-follow guide for quick setup and immediate use.
  • Central air-like airflow is delivered at a 45-degree angle, optimizing air distribution without blowing directly in your face, while using eco-friendly R32 refrigerant.
  • Compatible with smart home systems, the air conditioner can be controlled remotely via smartphone or voice assistant for convenience and energy management.
  • Designed by a company with 60 years of air conditioning expertise, it combines modern aesthetics with effective technology for urban living and improved air quality.
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  • WhisperTech technology makes this 10000 BTU window air conditioner 9 times quieter than traditional units, enhancing sleep comfort in spaces up to 450 sq ft.
  • The air conditioner comes with a pre-assembled installation kit and an easy-to-follow guide for quick setup and immediate use.
  • Central air-like airflow is delivered at a 45-degree angle, optimizing air distribution without blowing directly in your face, while using eco-friendly R32 refrigerant.
  • Compatible with smart home systems, the air conditioner can be controlled remotely via smartphone or voice assistant for convenience and energy management.
  • Designed by a company with 60 years of air conditioning expertise, it combines modern aesthetics with effective technology for urban living and improved air quality.
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#3
LG 6,000 BTU Window Air Conditioner, 115V, Cools 250 Sq.Ft. for Bedroom, Den, Living Room, Quiet Operation, with Remote, 2 Cooling & Fan Speeds, 2-Way Air Deflection, Auto Restart, White
LG 6,000 BTU Window Air Conditioner, 115V, Cools 250 Sq.Ft. for Bedroom, Den, Living Room, Quiet Operation, with Remote, 2 Cooling & Fan Speeds, 2-Way Air Deflection, Auto Restart, White
LG 6,000 BTU Window Air Conditioner, 115V, Cools 250 Sq.Ft. for Bedroom, Den, Living Room, Quiet Operation, with Remote, 2 Cooling & Fan Speeds, 2-Way Air Deflection, Auto Restart, White
LG 6,000 BTU Window Air Conditioner, 115V, Cools 250 Sq.Ft. for Bedroom, Den, Living Room, Quiet Operation, with Remote, 2 Cooling & Fan Speeds, 2-Way Air Deflection, Auto Restart, White
LG 6,000 BTU Window Air Conditioner, 115V, Cools 250 Sq.Ft. for Bedroom, Den, Living Room, Quiet Operation, with Remote, 2 Cooling & Fan Speeds, 2-Way Air Deflection, Auto Restart, White
LG 6,000 BTU Window Air Conditioner, 115V, Cools 250 Sq.Ft. for Bedroom, Den, Living Room, Quiet Operation, with Remote, 2 Cooling & Fan Speeds, 2-Way Air Deflection, Auto Restart, White
LG 6,000 BTU Window Air Conditioner, 115V, Cools 250 Sq.Ft. for Bedroom, Den, Living Room, Quiet Operation, with Remote, 2 Cooling & Fan Speeds, 2-Way Air Deflection, Auto Restart, White
LG 6,000 BTU Window Air Conditioner, 115V, Cools 250 Sq.Ft. for Bedroom, Den, Living Room, Quiet Operation, with Remote, 2 Cooling & Fan Speeds, 2-Way Air Deflection, Auto Restart, White
LG
11% Off
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  • Operates quietly at sound levels as low as 52dB, ensuring minimal disruption during use.
  • Offers 3 adjustable cooling and fan speeds for personalized comfort.
  • Features a user-friendly digital control panel, remote control, and a slide-out washable filter for easy maintenance.
  • Automatically restarts after power outages, providing convenience without manual intervention.
  • Designed to efficiently cool spaces up to 250 square feet, suitable for medium-sized rooms.
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  • Operates quietly at sound levels as low as 52dB, ensuring minimal disruption during use.
  • Offers 3 adjustable cooling and fan speeds for personalized comfort.
  • Features a user-friendly digital control panel, remote control, and a slide-out washable filter for easy maintenance.
  • Automatically restarts after power outages, providing convenience without manual intervention.
  • Designed to efficiently cool spaces up to 250 square feet, suitable for medium-sized rooms.
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#4
GE Window Air Conditioner Unit, 6,000 BTU for Small Rooms up to 250 sq ft. with Adjustable Fan and Cooling Settings, Perfect for Small Bedroom or Living Room, Easy Install Kit Included, White
GE Window Air Conditioner Unit, 6,000 BTU for Small Rooms up to 250 sq ft. with Adjustable Fan and Cooling Settings, Perfect for Small Bedroom or Living Room, Easy Install Kit Included, White
GE Window Air Conditioner Unit, 6,000 BTU for Small Rooms up to 250 sq ft. with Adjustable Fan and Cooling Settings, Perfect for Small Bedroom or Living Room, Easy Install Kit Included, White
GE Window Air Conditioner Unit, 6,000 BTU for Small Rooms up to 250 sq ft. with Adjustable Fan and Cooling Settings, Perfect for Small Bedroom or Living Room, Easy Install Kit Included, White
GE Window Air Conditioner Unit, 6,000 BTU for Small Rooms up to 250 sq ft. with Adjustable Fan and Cooling Settings, Perfect for Small Bedroom or Living Room, Easy Install Kit Included, White
GE Window Air Conditioner Unit, 6,000 BTU for Small Rooms up to 250 sq ft. with Adjustable Fan and Cooling Settings, Perfect for Small Bedroom or Living Room, Easy Install Kit Included, White
GE Window Air Conditioner Unit, 6,000 BTU for Small Rooms up to 250 sq ft. with Adjustable Fan and Cooling Settings, Perfect for Small Bedroom or Living Room, Easy Install Kit Included, White
GE Window Air Conditioner Unit, 6,000 BTU for Small Rooms up to 250 sq ft. with Adjustable Fan and Cooling Settings, Perfect for Small Bedroom or Living Room, Easy Install Kit Included, White
GE
15% Off
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  • Efficiently cools rooms up to 250 sq ft.
  • Ideal for small spaces such as bedrooms and home offices.
  • Operates quietly, suitable for use during the night.
  • Offers 3 cooling modes and 3 fan speeds for customizable comfort.
  • Simple installation in double hung windows with included kit; features a cleanable slide-out filter.
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  • Efficiently cools rooms up to 250 sq ft.
  • Ideal for small spaces such as bedrooms and home offices.
  • Operates quietly, suitable for use during the night.
  • Offers 3 cooling modes and 3 fan speeds for customizable comfort.
  • Simple installation in double hung windows with included kit; features a cleanable slide-out filter.
#5
6% Off
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  • Maintains preset room temperatures for all-day comfort
  • Features a washable filter that effectively captures dust, enhancing efficiency
  • Includes a long power cord, eliminating the need for extension cords
  • Automatically resumes previous settings after a power outage
  • Suitable for installation in standard double-hung windows with widths ranging from 24 to 36 inches
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  • Maintains preset room temperatures for all-day comfort
  • Features a washable filter that effectively captures dust, enhancing efficiency
  • Includes a long power cord, eliminating the need for extension cords
  • Automatically resumes previous settings after a power outage
  • Suitable for installation in standard double-hung windows with widths ranging from 24 to 36 inches
#6
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  • Provides effective cooling for spaces up to 250 square feet with a capacity of 6,000 BTU.
  • Includes auto restart and timer for convenience.
  • Temperature adjustable between 61℉-88℉ with remote control and LED panel.
  • Offers four modes: Auto, Cool, Fan, and Dry, plus a 24-hour timer and sleep mode.
  • Comes with a complete installation kit and a washable, easily removable filter.
  • Compact design fits standard windows with a minimum height of 14.5" and a width of 23"-34".
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  • Provides effective cooling for spaces up to 250 square feet with a capacity of 6,000 BTU.
  • Includes auto restart and timer for convenience.
  • Temperature adjustable between 61℉-88℉ with remote control and LED panel.
  • Offers four modes: Auto, Cool, Fan, and Dry, plus a 24-hour timer and sleep mode.
  • Comes with a complete installation kit and a washable, easily removable filter.
  • Compact design fits standard windows with a minimum height of 14.5" and a width of 23"-34".
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#7
20% Off
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  • Cooling coverage of up to 450 square feet, suitable for living rooms, homes, and offices. Features manual air direction adjustment for tailored airflow.
  • Remote and smart control capabilities through the SmartLife-SmartHome app, compatible with iOS and Android for convenience.
  • Temperature adjustable from 61°F to 88°F (16°C to 31°C) with three fan speeds, multiple modes including cooling and dry, plus a washable filter for easy maintenance.
  • Combined Energy Efficiency Rate (CEER) of 11.0, with Eco and Sleep Modes for energy savings and comfort throughout the night. Includes a flexible timer for convenient operation scheduling.
  • Designed for easy installation in small rooms; compatible with windows between 23''-36'' wide and 14.5'' high, with all necessary mounting accessories included.
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  • Cooling coverage of up to 450 square feet, suitable for living rooms, homes, and offices. Features manual air direction adjustment for tailored airflow.
  • Remote and smart control capabilities through the SmartLife-SmartHome app, compatible with iOS and Android for convenience.
  • Temperature adjustable from 61°F to 88°F (16°C to 31°C) with three fan speeds, multiple modes including cooling and dry, plus a washable filter for easy maintenance.
  • Combined Energy Efficiency Rate (CEER) of 11.0, with Eco and Sleep Modes for energy savings and comfort throughout the night. Includes a flexible timer for convenient operation scheduling.
  • Designed for easy installation in small rooms; compatible with windows between 23''-36'' wide and 14.5'' high, with all necessary mounting accessories included.
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#8
25% Off
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  • 3-in-1 window air conditioner suitable for rooms up to 250 sq ft, with 6,000 BTU cooling power and 3 fan speeds, plus moisture removal capability of 1.3 pints/hour
  • Washable dust filter ensures efficient operation and includes an alert for cleaning
  • Programmable timer allows scheduling of on/off cycles in half-hour increments for optimal comfort
  • Sleep mode gradually adjusts room temperature for comfort during the night while minimizing noise
  • Remote control with built-in thermostat for precise temperature and fan speed management from a distance
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  • 3-in-1 window air conditioner suitable for rooms up to 250 sq ft, with 6,000 BTU cooling power and 3 fan speeds, plus moisture removal capability of 1.3 pints/hour
  • Washable dust filter ensures efficient operation and includes an alert for cleaning
  • Programmable timer allows scheduling of on/off cycles in half-hour increments for optimal comfort
  • Sleep mode gradually adjusts room temperature for comfort during the night while minimizing noise
  • Remote control with built-in thermostat for precise temperature and fan speed management from a distance
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#9
5% Off
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  • Ideal for cooling smaller spaces up to 150 sq. ft. with multiple temperature settings, cooling modes, and adjustable air direction.
  • Energy-efficient operation with a Combined Energy Efficiency Rate (CEER) of 11.0, designed to lower energy costs.
  • Operates quietly, comparable to a household refrigerator, and comes with user-friendly mechanical controls and a washable air filter.
  • Simple installation process compatible with windows measuring 23''-36'' wide and at least 13'' high, with all necessary mounting accessories included.
  • Includes a 1 Year Parts & Labor Warranty for assurance, with customer support available for any inquiries.
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  • Ideal for cooling smaller spaces up to 150 sq. ft. with multiple temperature settings, cooling modes, and adjustable air direction.
  • Energy-efficient operation with a Combined Energy Efficiency Rate (CEER) of 11.0, designed to lower energy costs.
  • Operates quietly, comparable to a household refrigerator, and comes with user-friendly mechanical controls and a washable air filter.
  • Simple installation process compatible with windows measuring 23''-36'' wide and at least 13'' high, with all necessary mounting accessories included.
  • Includes a 1 Year Parts & Labor Warranty for assurance, with customer support available for any inquiries.
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#10
23% Off
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  • Cooling coverage suitable for spaces up to 250 square feet, ideal for small living areas and offices.
  • Remote control capability through the SmartLife-SmartHome app for iOS and Android, allowing adjustments from anywhere.
  • Temperature adjustable between 61°F and 88°F with three fan speeds and multiple modes including cooling, dry, fan, and auto. Comes with a washable filter for easy maintenance.
  • Energy-efficient design with a CEER of 11.0, featuring Eco and Sleep modes for optimized energy use and comfort during sleep, along with a flexible timer for automatic operation.
  • Simple installation process compatible with windows ranging from 23'' to 34'' wide and at least 14.5'' high, with all necessary mounting accessories included.
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  • Cooling coverage suitable for spaces up to 250 square feet, ideal for small living areas and offices.
  • Remote control capability through the SmartLife-SmartHome app for iOS and Android, allowing adjustments from anywhere.
  • Temperature adjustable between 61°F and 88°F with three fan speeds and multiple modes including cooling, dry, fan, and auto. Comes with a washable filter for easy maintenance.
  • Energy-efficient design with a CEER of 11.0, featuring Eco and Sleep modes for optimized energy use and comfort during sleep, along with a flexible timer for automatic operation.
  • Simple installation process compatible with windows ranging from 23'' to 34'' wide and at least 14.5'' high, with all necessary mounting accessories included.
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