Window heater units combine cooling and supplemental heating to extend comfort beyond summer. Below is a quick comparison of top picks to help you choose a unit that fits room size, installation, and feature needs.
| Product | Type | Heating Source | Coverage |
|---|---|---|---|
| Midea 8,000 BTU Smart Inverter Window Unit | Window Heat Pump | Heat Pump (supplemental) | Up To 350 Sq. Ft. |
| LG 23,000 BTU Window Air Conditioner With Heat | High-Capacity Window Unit | Supplemental Heat | Up To 1,400 Sq. Ft. |
| ROVSUN 8,000 BTU Window Air Conditioner With Heat | Smart Window Heat Pump | Heat Pump (4000 BTU heating spec) | Up To 350 Sq. Ft. |
| GE AWGP08WWA 8,000 BTU Smart Heat/Cool Window AC | Window Heat Pump | Advanced Heat Pump | Up To 350 Sq. Ft. |
| Keystone 23,200 BTU Window-Wall AC With 16,000 BTU Heat | Through-Wall/Window High-Capacity | Supplemental Heat | Up To 1,500 Sq. Ft. |
Midea 8,000 BTU Smart Inverter Window Unit
The Midea 8000 BTU window unit is a multi-season inverter designed for cooling, dehumidifying, and supplemental heating in rooms up to 350 sq. ft. It uses a heat pump function that operates effectively when outdoor temperatures are above 41°F.
- Modes And Controls: Heat, Auto, Cool, Dry, Fan with LED display, 3 fan speeds, 24-hour timer, and swing louvers for directional airflow.
- Smart Features: Wireless control through the SmartHome App and voice commands via Alexa/Google Assistant.
- Energy Efficiency: Energy Star rated and uses variable-speed inverter technology for up to ~35% energy savings vs. standard units.
- Maintenance: Front-access washable filter for routine cleaning.
This unit emphasizes energy-efficient operation and smart connectivity while providing supplemental heat suitable for mild cold periods. The heat pump limits use in colder climates where outdoor temps drop below its operating range.
LG 23,000 BTU Window Air Conditioner With Heat
The LG 23,000 BTU model is a high-capacity window air conditioner with supplemental heat designed for large spaces up to 1,400 sq. ft. It is intended for homeowners needing strong cooling and additional heating support in sizable rooms.
- Noise And Comfort: Low noise operation down to about 50 dB in low mode.
- Heating Function: Supplemental heat option to add warmth during cooler days; not intended as a primary home heating source in extreme cold.
- Airflow Control: Multiple fan speeds for cooling, heating, and fan-only modes to customize comfort.
This unit targets large-room performance where both cooling power and supplemental heating capability are necessary. Installation requirements include 230V supply; suitability depends on window dimensions and electrical capacity.
ROVSUN 8,000 BTU Window Air Conditioner With Heat
The ROVSUN 8000 BTU window unit is an all-season smart solution combining 8000 BTU cooling with 4000 BTU heating, dehumidification, and fan modes for spaces up to 350 sq. ft.
- Modes & Controls: LED display with Heat, Auto, Cool, Dry, Fan modes, 3 speeds, and 24-hour timer.
- Smart Integration: Works with a phone app and voice assistants (Alexa/Google Assistant) in addition to remote and panel controls.
- Installation & Maintenance: Includes an easy installation kit and a front-access washable filter.
ROVSUN emphasizes smart connectivity and multi-mode versatility, offering convenience features useful for apartments and medium rooms. Heating output is modest, best for supplemental warming rather than primary heating.
GE AWGP08WWA 8,000 BTU Smart Heat/Cool Window AC
The GE AWGP08WWA is a smart window air conditioner with a heat pump that provides both cooling and heating for medium rooms up to 350 sq. ft. It highlights improved heating efficiency versus traditional resistance heat.
- Heat Pump Efficiency: Advanced heat pump tech claims up to 2x improved heating effectiveness compared to electric resistance heaters.
- Smart Control: Wi‑Fi enabled and compatible with the SmartHQ app for remote monitoring and control.
- Capacity: 8,000 BTU cooling and 8,000 BTU heating capacity aimed at year‑round comfort.
The GE model is focused on efficient supplemental heating and remote management, making it a practical option when smart home integration and improved heat pump performance are priorities.
Keystone 23,200 BTU Window-Wall AC With 16,000 BTU Heat
The Keystone 23,200 BTU through-wall/window unit provides high cooling capacity and substantial supplemental heating (16,000 BTU) for large spaces up to 1,500 sq. ft.
- All-In-One Function: Cooling, supplemental heating, dehumidification, and fan circulation for large room coverage.
- Supplemental Heat Note: The heating mode is supplemental and recommended for milder outdoor temperatures; not a primary heat source in extreme cold.
- Smart Remote: Remote displays and transmits room temperature to the unit to support accurate control.
This unit suits situations requiring high-capacity climate control where through-wall or large-window mounting is feasible and a robust supplemental heat option is advantageous.
Buying Guide: How To Choose The Best Window Heater Unit
Choosing the right window heater unit requires evaluating room size, heating type, installation needs, and energy use. The following factors and comparisons will help align product features with practical needs.
1. Heating Technology And Performance
Heat Pump vs. Electric Resistance/Supplemental Heat: Most modern window units with heating use heat pump technology, which is more energy-efficient but has an outdoor temperature operating limit (commonly around 41°F). Units labeled “supplemental heat” or with higher BTU supplemental heat ratings are designed to assist home heating but may not replace a furnace in very cold climates.
2. Room Size And BTU Capacity
Match BTU To Space: Select a unit whose cooling/heating BTU rating corresponds to room square footage. Smaller rooms (≤350 sq. ft.) are well-served by 8,000–12,000 BTU models, while larger spaces require 18,000–23,000+ BTU units or through-wall systems.
3. Electrical Requirements And Installation
Voltage And Circuit: Check whether the unit requires 115V (most smaller units) or 230V (large units). Higher-capacity models often need a dedicated circuit and professional installation if wiring upgrades are required.
Window Size And Support: Confirm physical fit and that the window or wall opening supports the unit’s depth and weight. Through-wall installations may require sleeves or professional modification.
4. Efficiency And Operating Costs
Energy Star And Inverter Tech: Look for Energy Star ratings and inverter compressors for improved efficiency and quieter operation. Heat pumps typically consume less electricity for heating than electric resistance modes.
5. Noise And Comfort Features
Decibel Ratings: If bedroom or office use is intended, compare noise levels. Units with multiple fan speeds and low-noise modes can reduce disruption at night.
Air Distribution: Adjustable louvers, swing modes, and directional airflow help spread warm air more evenly in the room.
6. Smart Controls And Convenience
Remote And Wi‑Fi: Remote control, Wi‑Fi app support, and voice assistant compatibility add convenience. Consider whether app control, scheduling, and geofencing matter to your routine.
Timers And Energy Saver Modes: Timers, sleep modes, and eco settings help reduce runtime and energy costs.
7. Maintenance And Durability
Filter Access: Front-access washable filters simplify maintenance. Check for available replacement parts and manufacturer support when comparing brands.
Seasonal Use And Warranty: Review warranty terms and recommended operating conditions for heat pump functionality and motor/compresser coverage.
8. Comparison Perspectives
- Efficiency-Focused Buyers: Prefer inverter and Energy Star rated heat pump units like the Midea for energy savings and smart controls.
- Large-Room Requirements: Consider high-capacity 230V models such as LG, Keystone, or Whirlpool for more coverage and stronger supplemental heat.
- Smart Home Integration: GE, Midea, and ROVSUN offer Wi‑Fi and voice assistant support for remote scheduling and monitoring.
- Budget And Simplicity: Smaller, mechanically simple units or non‑Wi‑Fi models reduce initial cost and complexity; ensure they still meet heating needs.
9. Practical Tips Before Purchase
- Measure window opening and available electrical capacity before selecting a model.
- Verify the unit’s heating operating range and whether it meets local winter conditions.
- Plan for installation: two-person lift for heavier units and proper sealing to prevent drafts.
- Consider supplemental insulation and drafts to improve heating effectiveness and reduce runtime.