Best Heat and AC Wall Unit Combo for 300 Sq Ft Room in 2025
Updated on July 2025
#1
Recommended
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- 23,200 BTU cooling and 16,000 BTU heating capacity suitable for areas up to 1,500 sq. ft.
- Functions include cooling, supplemental heating, dehumidification, and fan circulation; supplemental heating for ambient temperatures between 23°F and 76°F.
- Smart remote measures room temperature and communicates with AC unit every 3 minutes for precise cooling.
- Energy-efficient operation using 'Energy Saver' or 'Sleep' mode to lower electricity costs.
- Compact design for installation through the wall, includes window installation kit, with minimum window height of 19.5 inches.
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- 23,200 BTU cooling and 16,000 BTU heating capacity suitable for areas up to 1,500 sq. ft.
- Functions include cooling, supplemental heating, dehumidification, and fan circulation; supplemental heating for ambient temperatures between 23°F and 76°F.
- Smart remote measures room temperature and communicates with AC unit every 3 minutes for precise cooling.
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#2
Value for Money
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- 18,000 BTU cooling capacity and 16,000 BTU heating capacity for large spaces up to 1,000 sq. ft.
- Multi-functional unit offering cooling, supplemental heating, dehumidification, and fan modes; supplementary heating designed for outdoor temperatures between 23°F and 76°F.
- Smart remote monitors room temperature and communicates with the air conditioner every 3 minutes for precise climate control.
- Energy-efficient operation with 'Energy Saver' and 'Sleep' modes reduces electricity costs.
- Compact design with included window installation kit saves floor space.
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- 18,000 BTU cooling capacity and 16,000 BTU heating capacity for large spaces up to 1,000 sq. ft.
- Multi-functional unit offering cooling, supplemental heating, dehumidification, and fan modes; supplementary heating designed for outdoor temperatures between 23°F and 76°F.
- Smart remote monitors room temperature and communicates with the air conditioner every 3 minutes for precise climate control.
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#3
7% Off
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- Portable air conditioner designed for spaces up to 500 sq. ft., recognized by Good Housekeeping as the best overall in 2024.
- Operates quietly at 51 dBA while providing 14,000 BTU cooling capacity, utilizing eco-friendly CFC-free R-32 refrigerant.
- Features a built-in dehumidifier with a capacity of 71 pints per day and a dual-hose system for efficient moisture removal.
- Offers four modes: cooling, dehumidifying, fan (with three speeds), and heating; adjustable thermostat range from 61°F to 89°F.
- Includes a window kit, extendable intake and exhaust hoses, an activated carbon air filter, and a washable pre-filter for easy maintenance.
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- Portable air conditioner designed for spaces up to 500 sq. ft., recognized by Good Housekeeping as the best overall in 2024.
- Operates quietly at 51 dBA while providing 14,000 BTU cooling capacity, utilizing eco-friendly CFC-free R-32 refrigerant.
- Features a built-in dehumidifier with a capacity of 71 pints per day and a dual-hose system for efficient moisture removal.
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#4
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- Energy-efficient cooling and heating with a high-power 0.75 ton heat pump, featuring innovative inverter technology for reduced power consumption and extended equipment life.
- Five operational modes: auto, cool, dry, heat, and fan, along with four fan speeds and additional functions like sleep mode, ECO mode, iFEEL, and turbo for versatile comfort year-round.
- Convenient remote control allows easy adjustment from anywhere in the room, with a timer for scheduled operation and low-noise performance for undisturbed sleep.
- Self-cleaning function with a high-temperature setting and washable filter for easy maintenance, plus an auto-defrost feature in the outdoor unit to enhance energy efficiency and prevent damage.
- Licensed HVAC installation recommended for optimal performance, backed by a 5-year parts and 8-year compressor warranty for durability and reliability.
- Uses eco-friendly R32 refrigerant, providing a sustainable alternative to older refrigerants that are harmful to the environment.
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- Energy-efficient cooling and heating with a high-power 0.75 ton heat pump, featuring innovative inverter technology for reduced power consumption and extended equipment life.
- Five operational modes: auto, cool, dry, heat, and fan, along with four fan speeds and additional functions like sleep mode, ECO mode, iFEEL, and turbo for versatile comfort year-round.
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#5
37% Off
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- Lightweight and portable design with rolling wheels for easy movement around the home or office.
- Functions as a built-in dehumidifier, effectively reducing humidity levels.
- Offers four operating modes: cooling, heating, dehumidifying, and fan, with automatic swing mode for enhanced air circulation.
- Equipped with a digital control panel and remote control for convenient operation, including temperature, mode, and timer settings.
- Delivers 10,000 BTU cooling and 9,000 BTU heating power, covering areas up to 450 sq. ft., with a quiet operation noise level of 52-56 dBa.
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- Lightweight and portable design with rolling wheels for easy movement around the home or office.
- Functions as a built-in dehumidifier, effectively reducing humidity levels.
- Offers four operating modes: cooling, heating, dehumidifying, and fan, with automatic swing mode for enhanced air circulation.
- Equipped with a digital control panel and remote control for convenient operation, including temperature, mode, and timer settings.
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#6
7% Off
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- 12,000 BTU mini split air conditioner with a built-in heat pump for efficient temperature control from 61℉ to 88℉.
- Quiet operation with WiFi control; effective for areas up to 750 Sq. Ft., featuring customizable airflow, a 24-hour timer, sleep mode, and multiple operational modes.
- Energy-efficient with a 19 SEER2 and 8.5 HSPF2 rating, utilizing variable frequency technology for up to 30% energy savings and an automatic defrost function to extend lifespan.
- Includes indoor fan coil, outdoor condenser, wireless remote, 16 ft. line set, installation accessories, and vibration absorbers for easy setup; professional installation recommended.
- 3-year compressor warranty and commitment to high-quality products with a 100% satisfaction guarantee.
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- 12,000 BTU mini split air conditioner with a built-in heat pump for efficient temperature control from 61℉ to 88℉.
- Quiet operation with WiFi control; effective for areas up to 750 Sq. Ft., featuring customizable airflow, a 24-hour timer, sleep mode, and multiple operational modes.
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#7
23% Off
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- All-season mini split air conditioning system with heating and dehumidification functions, including automatic defrost, self-diagnosis, and a 24-hour timer.
- High-efficiency cooling and heating with a powerful compressor and inverter technology; 17 SEER2 rating for improved energy savings of 25% over units with 14 SEER2 rating and operates in temperatures from 5°F to 122°F.
- WiFi-enabled with voice control via mobile app or compatible with Alexa/Google Assistant for remote temperature adjustments and routine setting.
- Quiet operation at 29 dBa for low-speed performance; features a 24-hour timer and adjustable display for undisturbed sleep.
- Satisfaction guarantee with professional installation recommended; suitable for home, storage, office, and light commercial use.
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- All-season mini split air conditioning system with heating and dehumidification functions, including automatic defrost, self-diagnosis, and a 24-hour timer.
- High-efficiency cooling and heating with a powerful compressor and inverter technology; 17 SEER2 rating for improved energy savings of 25% over units with 14 SEER2 rating and operates in temperatures from 5°F to 122°F.
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#8
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- Operates quietly at sound levels as low as 50dB, ideal for a distraction-free environment and restful sleep.
- Includes a supplemental heat option for cooler days, maintaining a consistent temperature in various spaces like living rooms and offices.
- Features two cooling, heating, and fan speeds for customizable airflow and temperature control.
- The Auto Restart function reactivates the unit automatically after a power outage, ensuring continued climate control.
- Effective cooling for spaces up to 1400 square feet, suitable for medium-sized rooms like living rooms or bedrooms.
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- Operates quietly at sound levels as low as 50dB, ideal for a distraction-free environment and restful sleep.
- Includes a supplemental heat option for cooler days, maintaining a consistent temperature in various spaces like living rooms and offices.
- Features two cooling, heating, and fan speeds for customizable airflow and temperature control.
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#9
10% Off
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- Cools and warms spaces up to 400 square feet, making it suitable for medium-sized rooms; includes a low-noise compressor (52 dB) and a Self-Evaporating System to minimize water tray emptying.
- Multi-functional with cooling (12,000 BTU), heating (12,000 BTU), dehumidifying, and fan capabilities for year-round comfort.
- Features an LED display and remote control for easy operation; includes a programmable 24-hour timer, 3 fan speeds, and an automatic air swing function for efficient airflow and moisture removal (91 pints/day).
- Compact design (17.4 x 13.4 x 32.7 inches) for easy installation in spaces that can't accommodate traditional AC units; washable filters maintain indoor air quality.
- Portable with wheels and handles for effortless movement between rooms; versatile for use in various settings such as dorms, apartments, and offices.
- This unit should not be used near open flames or heat sources.
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- Cools and warms spaces up to 400 square feet, making it suitable for medium-sized rooms; includes a low-noise compressor (52 dB) and a Self-Evaporating System to minimize water tray emptying.
- Multi-functional with cooling (12,000 BTU), heating (12,000 BTU), dehumidifying, and fan capabilities for year-round comfort.
- Features an LED display and remote control for easy operation; includes a programmable 24-hour timer, 3 fan speeds, and an automatic air swing function for efficient airflow and moisture removal (91 pints/day).
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#10
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- Powerful cooling and heating with 12,000 BTU for spaces up to 550 sq. ft.
- User-friendly electronic control panel featuring digital display, multiple cooling speeds, and programmable timer.
- Quick installation with a window mounting kit designed for minimum window height of 19.5 inches.
- Washable filter helps maintain air quality by capturing dust and debris, ensuring optimal unit performance.
- Convenient remote control allows easy adjustments from a distance.
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- Powerful cooling and heating with 12,000 BTU for spaces up to 550 sq. ft.
- User-friendly electronic control panel featuring digital display, multiple cooling speeds, and programmable timer.
- Quick installation with a window mounting kit designed for minimum window height of 19.5 inches.
- Washable filter helps maintain air quality by capturing dust and debris, ensuring optimal unit performance.
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