Best Window Mounted Heater and Window AC With Heat

Window-mounted heaters and combination window air conditioners with supplemental heat are practical solutions for apartments, bedrooms, and rooms where space or installation limits prevent central HVAC upgrades. Below is a concise comparison table of five relevant units selected for window or wall-through installations that include heating capability, control options, and capacity suitable for a variety of room sizes.

Model	Type	Heating Feature	Coverage
Whirlpool 12,000 BTU	Window AC With Supplemental Heat	Supplemental Electric Heat	Up To 550 Sq. Ft.
Midea 12,000 BTU Smart Inverter	Window AC With Heat Pump	Heat Pump (works >41°F)	Up To 550 Sq. Ft.
Midea 8,000 BTU Smart Inverter	Window AC With Heat Pump	Heat Pump (works >41°F)	Up To 350 Sq. Ft.
GE AWGP08WWA 8,000 BTU	Window AC With Heat Pump	Advanced Heat Pump Heating	Up To 350 Sq. Ft.
Keystone 14,000 BTU	Wall Mounted AC With Supplemental Heat	Supplemental Electric Heat	Up To 700 Sq. Ft.

Whirlpool 12,000 BTU Window AC With Supplemental Heat

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Cooling And Heating Capacity: Rated at 12,000/11,600 BTU cooling and offers 11,000/9,000 BTU supplemental heat, designed for rooms up to about 550 sq. ft.

Controls And Modes: Electronic control panel with a digital display, three cooling speeds, eco and sleep modes, and a programmable 24-hour timer provide flexible scheduling and comfort management.

Installation And Fit: Includes a quick window mounting kit for windows with a minimum height of 19.5 inches; 8-way directional louvers help distribute conditioned air across the room.

Usage Notes: Manufacturer notes the supplemental heating is not intended as a primary heat source for the coldest months; best used for mild cold or transitional seasons.

Midea 12,000 BTU Smart Inverter Window AC With Heat

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Multi-Season Performance: Inverter-driven unit provides 12,000 BTU cooling and heat via a heat pump, suitable for spaces up to 550 sq. ft. Heat pump operation is effective when outdoor temps remain above approximately 41°F.

Energy Efficiency And Controls: Energy Star rated with variable-speed inverter technology for reduced electricity use. Offers LED display, five operating modes, remote, app control, and voice assistant compatibility for smart-home integration.

Dehumidification And Maintenance: Built-in dehumidifier mode and a washable front-access filter simplify upkeep and maintain airflow efficiency.

Midea 8,000 BTU Smart Inverter Window AC With Heat

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Compact Multi-Season Unit: Designed for rooms up to 350 sq. ft. with 8,000 BTU cooling and heat pump heating for mild winter conditions when outside temps are above 41°F.

Smart Features: Offers LED display, five operation modes, three fan speeds, 24-hour timer, ECO mode, and wireless app/voice control. Good option where smart control and energy savings matter for medium rooms.

Filter And Efficiency: Energy Star-rated with inverter technology for efficient cycling and a washable filter accessible from the front panel for routine cleaning.

GE AWGP08WWA 8,000 BTU Smart Heat/Cool Window Unit

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Heat Pump Technology: Uses an advanced heat pump to deliver heating and cooling at 8,000 BTU for rooms up to 350 sq. ft. Heat pump design offers faster, more energy-efficient warmth than basic resistance heat.

Connectivity And Control: Wi‑Fi enabled for control through the manufacturer app, allowing remote temperature adjustments and scheduling for improved convenience.

Application And Notes: Designed for year-round comfort in medium rooms; heat pump performance will vary with outdoor temperatures and may require supplemental heat during very cold weather.

Keystone 14,000 BTU Wall Mounted AC With Supplemental Heat

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High Capacity Wall Unit: Provides 14,000 BTU cooling and 10,600 BTU supplemental heat suitable for larger spaces up to 700 sq. ft. Intended as a wall-through unit, preserving window views and floor space.

Installation And Power: Requires a dedicated 230V/20A circuit and an interior trim kit for through-the-wall installation. Supplemental heating recommended for moderate cold only.

Functionality: Includes cooling, supplemental heating, dehumidification, and fan circulation modes. Supplemental heat is not intended as a sole heat source in very cold climates.

Buying Guide: How To Choose A Window Mounted Heater Or Window AC With Heat

1. Heating Type: Heat Pump Vs. Electric Resistance

Heat Pump units extract heat from outside air and are typically more energy efficient in mild to moderate cold but lose efficiency below roughly 41°F. Electric resistance or supplemental heat provides direct warmth independent of outdoor temperature but is generally less efficient and better for short-duration or mild supplemental heating.

2. Room Size And BTU Rating

Match the unit’s BTU rating to the space. Under-sizing leads to inadequate warmth; oversizing can short-cycle and waste energy. Rough guidance: 8,000 BTU for ~250–350 sq. ft., 12,000 BTU for ~400–550 sq. ft., and higher capacity (e.g., 14,000 BTU) for larger rooms.

3. Installation Constraints

Window units require appropriate window dimensions and secure mounting kits. Wall-through units need an opening and possibly a dedicated electrical circuit (230V for larger models). Confirm minimum window height, electrical requirements, and whether a trim kit or sleeve is included.

4. Energy Efficiency And Operating Costs

Look for Energy Star or inverter technology for reduced operating costs. Heat pumps with variable-speed compressors often deliver the best seasonal efficiency. Consider the unit’s CEER/EER ratings where available.

5. Controls And Connectivity

Modern units offer timers, sleep and eco modes, remote controls, and Wi‑Fi for app/voice control. These features improve convenience and can reduce runtime through scheduling and geofencing.

6. Noise And Comfort Features

Noise ratings matter for bedrooms and living areas. Check fan speeds, sleep modes, and adjustable louvers for airflow direction. Dehumidification mode is useful in humid climates to improve perceived warmth.

7. Safety And Maintenance

Ensure easy access to washable filters and consider units with auto-defrost or automatic shutoff features for cold-weather performance. Regular filter cleaning preserves airflow and efficiency.

8. Electrical Requirements

Confirm voltage and amperage requirements. Larger cooling/heating combos may require a 230V circuit or dedicated 20A line. Cross-check your outlet and breaker capacity before purchase.

9. Intended Use And Climate Considerations

For climates with prolonged subfreezing conditions, a heat pump or supplemental window heater may not suffice as primary heat—use as zone heating or for transitional seasons. In milder climates, heat-pump window units provide year-round benefit.

10. Comparison Perspectives

• Efficiency Perspective: Heat pump window units (Midea, GE) typically outperform basic supplemental resistance heat on kilowatt-hours per BTU in mild temperatures.
• Capacity Perspective: Whirlpool and Keystone offer higher nominal heat/cooling capacity for larger rooms or when higher output is required.
• Integration Perspective: Smart-enabled models add convenience and scheduling that can reduce runtime and costs; consider app and voice compatibility if smart home integration is needed.
• Installation Perspective: Window units are easier for renters or seasonal use; wall-through units offer a permanent solution preserving window views but require more installation work and possible electrical upgrades.