The Midea MAH09H1AGR is the strongest documented cold-weather window heat pump in the sources reviewed for this guide: Midea reports heating output and COP at outdoor temperatures down to -13°F. Gradient CCHP11 and GREE GJH09BW-A6DRNL1B are other window-mounted models with heating modes, but the reviewed sources do not establish their low-temperature heating output. Compare verified heating performance, window fit, and electrical requirements before choosing a unit.
This comparison uses manufacturer and ENERGY STAR information, not hands-on testing. Current prices, stock, location-specific rebates, and household bill savings were not verified.
What Counts as a Window Heat Pump?
A true window heat pump moves heat in both directions: it removes heat from a room in cooling mode and brings heat into the room in heating mode. A listing that says “with heat” does not prove that a unit can provide useful heat in freezing weather. Some room air conditioners offer only supplemental heating over a limited temperature range.
For example, Midea describes its MAW08HV1CWT as providing supplemental heat between 40°F and 110°F. That is different from the Midea MAH09H1AGR, whose technical sheet reports heating operation down to -13°F. Check the exact model number and the manufacturer’s current documentation rather than relying on a product category label.
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- Multi-Season Comfort – This Midea 12000 BTU air conditioner is more versatile than standard AC units, offering powerful cooling and dehumidification in the summer and reliable supplemental heat in the fall. Best for large rooms up to 550 square feet. Note: Heat pump function will not operate if outside temperature is below 41°F.
- Easy To Use – This air conditioner and heat unit is well-equipped with a digital LED display, 5 Modes, 3 speed settings, 24-hr Timer, and ECO energy saver. The Swing button adjusts the louvers up/down to direct the airflow. Wireless enabled, control your comfort from your smartphone and your smartwatch using the Midea SmartHome app or your voice via Alexa and Google Assistant. All functions can be set via the control panel, remote control, and app or voice assistant.
- Save on Energy Without Sacrificing Comfort – This UL Listed, Energy Star certified air conditioner uses inverter technology to quickly cool your bedroom or apartment while providing up to 35% energy savings compared to the Energy Conservation Standard. With 12,000 BTUs, a CEER of 13.3, and 115V operation, this ac unit is loaded with features like auto shutoff, defrost control, and a washable front filter to maintain peak performance.
- Ultra Low Noise Performance – This ac window unit operates at a noise level as low as 45 dBA. It’s such a quiet air conditioner that you will barely notice it, even when it’s on high. Enjoy your Zoom call, watch your favorite TV show, have a conversation. This ac unit for bedroom also creates just the right amount of white noise so you can get some rest.
- Install Specs – This window air conditioner is designed to fit double hung windows with opening widths of 24 to 38.5 inches. Lower sash must open sufficiently to allow a clear vertical opening of 14.5 inches. AC window unit measures 19.41"W x 22.17"D x 13.9"H. Included components: 12000 btu window air conditioner, remote control, installation kit. This ac heater combo window unit is as a close as you can get to a mini split a/c. You may like it so much you just might buy two!
Best Window Heat Pumps by Use Case
Best-documented cold-weather pick: Midea MAH09H1AGR
Midea’s 2024 technical sheet reports the MAH09H1AGR’s heating output and coefficient of performance (COP) at several outdoor temperatures. These are manufacturer specifications, not independent test results. The model is the strongest documented cold-weather candidate in the reviewed sources, but suitability still depends on the room load, local climate, installation, and window fit.
| Outdoor temperature | Manufacturer-reported heating capacity | Manufacturer-reported COP |
|---|---|---|
| 47°F | 9,000 Btu/hr | 4.0 |
| 5°F | 9,000 Btu/hr | 2.0 |
| -13°F | 5,050 Btu/hr | 1.41 |
ENERGY STAR lists the model’s cooling capacity as 9,500 Btu/hr, CEER as 17.6, estimated annual energy use as 404.8 kWh, and dimensions as 25.0 by 20.9 inches. Cooling capacity is not heating output; use the temperature-specific heating figures above when assessing winter performance.
The unit weighs 130 pounds, according to Midea’s technical sheet. The sheet specifies a standard 15A, 120VAC outlet, saddle-style construction, and an included lift-assisted mounting bracket. Confirm the precise model suffix and current installation instructions before purchase; the manufacturer says specifications may change without notice.
Other heating-mode models to compare: Gradient CCHP11 and GREE GJH09BW-A6DRNL1B
ENERGY STAR lists both models with heating mode, variable-speed compressors, and window-straddling designs. The reviewed sources provide cooling and room-unit energy data, but not low-temperature heating output for either model. Do not assume they match the Midea MAH09H1AGR’s cold-weather performance without an official model document showing capacity and efficiency at the outdoor temperatures relevant to you.
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- Multi-Season Comfort - Midea 8000 BTU window air conditioner with heat is better than standard ac units. It will beat the heat in summer with powerful cooling and dehumidification and keep you warm through the fall with supplemental heat. Best for large rooms up to 350 square feet. NOTE: heat pump function works when outside temp> 41°F.
- Easy To Use – This air conditioner and heat unit comes with an LED display, 5 Modes (Heat, Auto, Cool, Dry, Fan), 3 speed settings (Auto/H/M/L), 24-hr Timer, and ECO energy saver. The Swing button adjusts the louvers up/down to direct the airflow. Wireless control enabled window ac with heat unit from anywhere with the SmartHome App, or with your voice via Alexa and Google Assistant. All functions can be set via the control panel, remote control, and app or voice assistant.
- Save Energy Being Cool – Save on energy costs and enjoy ultimate comfort with this energy star certified unit. This energy efficient air conditioner unit is engineered with variable-speed inverter technology that will quickly cool your bedroom or apartment space while using considerably less electricity; up to 35% energy savings compared to the Energy Conservation Standard. Washable filter is easily accessed from front panel for regular cleaning to maintain peak performance.
- Ultra Low Noise Performance – This ac window unit operates at a noise level as low as 45 dBA. It’s such a quiet air conditioner that you will barely notice it, even when it’s on high. Enjoy your Zoom call, watch your favorite TV show, have a conversation. This ac unit for bedroom also creates just the right amount of white noise so you can get some rest.
- Install Specs – This window air conditioner is designed to fit double hung windows with opening widths of 24 to 38.5 inches. Lower sash must open sufficiently to allow a clear vertical opening of 14.5 inches. AC window unit measures 19.41"W x 22.17"D x 13.9"H. Included components: 8000 btu window air conditioner, remote control, installation kit. This ac heater combo window unit is as a close as you can get to a mini split a/c. You may like it so much you just might buy two!
| Model | Cooling capacity | CEER | Estimated annual energy use | Listed dimensions | Evidence limit |
|---|---|---|---|---|---|
| Midea MAH09H1AGR | 9,500 Btu/hr | 17.6 | 404.8 kWh | 25.0 × 20.9 inches | Midea reports cold-weather heating figures; manufacturer data, not independent testing. |
| Gradient CCHP11 | 9,300 Btu/hr | 16.8 | 415.2 kWh | 25.3 × 24.0 inches | Reviewed sources do not establish low-temperature heating output. |
| GREE GJH09BW-A6DRNL1B | 9,300 Btu/hr | 16.1 | 433.2 kWh | 26.0 × 15.3 inches | Reviewed sources do not establish low-temperature heating output. |
ENERGY STAR’s cooling capacity, CEER, and annual energy-use estimates help compare room units; they do not establish winter heating cost or cold-weather capacity.
Mild-weather supplemental heat: Midea MAW08HV1CWT
Midea describes the MAW08HV1CWT as an 8,000 Btu DOE cooling-size-category inverter window unit with supplemental heat for outdoor temperatures from 40°F to 110°F and a one-year warranty. Midea’s room-area guidance for this product is an estimate, not a substitute for sizing a particular room. Do not treat this model’s “heat” feature as evidence of subfreezing heating capability.
How to Compare Window Heat Pumps
- Check heating capacity and COP at relevant outdoor temperatures. A 47°F rating alone does not tell you how a unit will perform in freezing weather. Look for official figures at temperatures your climate reaches, including the minimum operating temperature.
- Keep heating and cooling figures separate. Cooling Btu/hr does not represent heating output. Confirm which mode each published figure describes.
- Compare room-unit efficiency data appropriately. CEER and ENERGY STAR’s annual energy-use estimate can help compare room air conditioners, but they do not predict heating bills.
- Confirm the exact model and installation requirements. Check dimensions, weight, window geometry, outlet and circuit requirements, mounting support, warranty, and current manual.
- Check local price, availability, and incentives. These vary by date and location; the reviewed sources do not establish current retail prices or rebate eligibility.
Window Fit, Support, and Installation
Measure the window opening and compare it with the exact model’s current installation manual. Check sash type, clear opening width and height, sill depth, storm-window conflicts, and exterior trim. The Midea MAH09H1AGR’s 130-pound weight makes handling and support especially important. Its included lift-assisted bracket does not mean every window or sill can support the unit.
Follow the manufacturer’s instructions for mounting, sealing, drainage, and electrical connection. Have a qualified installer assess a questionable window, difficult access, or any work outside your experience. For the MAH09H1AGR, verify that the specified 15A, 120VAC outlet and circuit meet the current manual’s requirements; do not assume a nominally standard outlet is suitable without checking the circuit.
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- ✔ Fast Cooling & Heating: Dive into an all-season solution with our window AC and heater system, this 8000BTU unit featuring air conditioning, 4000BTU heating, dehumidifier & fan function for ideal climate control of room up to 350 square feet. Perfect choice for your room like home, office, or apartment
- ✔ Considerate Designs: This air conditioner & heater unit comes with an LED display, 5 modes (Heat, Auto, Cool, Dry, Fan), 3 speeds (Auto/H/M/L), 24H Timer and ECO energy-saver. Washable filter is easily accessed from front panel for regular cleaning to maintain peak performance. The swing button adjusts the louvers to direct the airflow. Easily create the perfect environment for multi-seasons
- ✔ WIFI-Enabled & Voice Control: Beside of the panel & remote control, seamlessly integrate with phone APP or voice control (works with Alexa/Google Assistant); Set routines for optimal temperature changes allows you to adjust your window air conditioner from anywhere so that you can enjoy endless comfort immediately once arriving home
- ✔ Simple Installation: Included with side panels and other installation parts save you a lot of assembly time. A detailed instruction manual makes assembly easily done in a short period (windows width: 26" - 36"; window height: 16")
- ✔ 100% Satisfaction: We do cover 1 year warranty on this ac unit, any questions about it, please don't hesitate to contact us at any time for getting a satisfied service. We are confident to stand behind our product and would like to guarantee you a best shopping experience with us
Efficiency and Energy Bills
A heat pump’s COP describes the relationship between heat delivered and electricity used under specified test conditions. Midea reports a COP of 4.0 for the MAH09H1AGR at 47°F, 2.0 at 5°F, and 1.41 at -13°F. These are manufacturer specifications for particular conditions, not a promise of household savings.
To estimate heating cost, consider the unit’s COP at the outdoor temperature in question, expected runtime, local electricity price, room load, and the heating system or fuel being displaced. ENERGY STAR’s annual energy-use figure is room-unit comparison data, not a forecast of winter heating use. DOE treats room air conditioners separately from central air-conditioning equipment; do not compare their criteria as if they were interchangeable.
The reviewed sources do not establish universal bill savings, payback, current rebate eligibility, or whether a specific model qualifies for a tax credit. Check the exact product against current program and tax guidance before counting on an incentive.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When a Window Heat Pump May Fit
A window heat pump may suit a room without ductwork where a window installation is permitted and the unit’s documented performance matches the room’s needs. A model with only supplemental heating may be more appropriate for mild-weather use than for primary winter heat. When comparing alternatives, account for installation constraints, comfort needs, and verified performance; do not rely on cooling efficiency alone to predict heating bills.
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FAQ
What is the best window heat pump for cold weather?
Among the models in the reviewed evidence, the Midea MAH09H1AGR has the clearest documented cold-weather heating figures. Midea reports 5,050 Btu/hr and COP 1.41 at -13°F. These are manufacturer specifications, not independent measurements, and the right choice still depends on the room and installation.
Can a window heat pump heat a room below freezing?
Some models have documented subfreezing operation, but a “heat” label alone does not establish that. Check the exact model’s heating capacity and COP at outdoor temperatures relevant to your location. Midea specifies the MAH09H1AGR down to -13°F; the reviewed sources do not provide comparable low-temperature heating output for Gradient CCHP11 or GREE GJH09BW-A6DRNL1B.
How much can a window heat pump lower energy bills?
There is no universal savings figure in the reviewed evidence. A bill comparison depends on heating COP at relevant outdoor temperatures, local electricity rates, runtime, room load, and the heating system or fuel the unit replaces. ENERGY STAR’s room-unit annual energy-use estimate is not a winter heating-cost estimate.
Is a window AC with heat the same as a cold-climate window heat pump?
No. A model advertised with heat may provide only supplemental heating over a limited outdoor-temperature range. Midea specifies 40°F to 110°F supplemental heating for the MAW08HV1CWT, while its MAH09H1AGR technical sheet reports heating operation down to -13°F. Check official specifications for the exact model.
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What should I check before installing a window heat pump?
Check the exact unit’s dimensions, weight, window compatibility, support and mounting instructions, electrical requirements, and drainage provisions. Confirm the window and circuit are suitable, and use qualified installation help when needed. For the Midea MAH09H1AGR, the manufacturer reports a weight of 130 pounds and specifies a 15A, 120VAC outlet with an included lift-assisted bracket.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
