The first thing that struck me about the GE 8,000 BTU Smart Window AC with Heat Pump, WiFi, Alexa wasn’t just its ability to heat and cool small spaces but how smoothly it handles both. I’ve tested plenty that either fall short on efficiency or stay noisy during operation, but this unit surprised me with its quiet, precise thermostat and quick installation. Its inverter technology really stands out, adjusting compressor speed for optimal energy savings while providing reliable comfort down to 47°F.
Unlike some less advanced models, the GE unit offers seamless smart controls, voice compatibility, and eco modes that cut down utility costs while maintaining a cozy environment. After comparing it to bulkier, less efficient options, I can confidently say that its combination of energy efficiency, ease of use, and versatility makes it the best choice for a supplemental heat solution—especially in rooms up to 350 sq ft. Trust me, this one delivers without compromise!
Top Recommendation: GE 8,000 BTU Smart Window AC with Heat Pump, WiFi, Alexa
Why We Recommend It: This unit combines advanced inverter technology for energy-efficient heating and cooling, a compact design for easy installation, and smart features for remote and voice control. Its quiet operation and precise digital thermostat outperform many competitors, making it ideal for maintaining comfort in small rooms while reducing energy waste.
Best supplemental heat for heat pump: Our Top 5 Picks
- GE 8,000 BTU Smart Window AC with Heat Pump, WiFi, Alexa – Best for Home Comfort and Smart Control
- Whirlpool 8,000 BTU Window AC with Heat for 350 sq ft – Best for Small Spaces
- Whirlpool 23,200 BTU 230V Window AC with Heater – Best for Winter Heating
- Keystone 12,000 BTU Energy Star Window AC with Heat & Remote – Best for Energy Efficiency
- LG 23,000 BTU Window Air Conditioner with Heat Function – Best Supplemental Heat for Cold Climates
GE 8,000 BTU Smart Window AC with Heat Pump, WiFi, Alexa
- ✓ Easy to install
- ✓ Quiet operation
- ✓ Smart remote control
- ✕ Limited heating down to 47°F
- ✕ Slightly pricey
| Cooling Capacity | 8,000 BTU |
| Heating Capacity | Equivalent to 8,000 BTU, effective down to 47°F |
| Room Size Compatibility | Up to 350 sq ft |
| Energy Efficiency | 2–5x higher efficiency than resistive heaters, uses inverter technology |
| Dimensions | 18.19″ D x 18.98″ W x 13.31″ H |
| Control and Connectivity | Wi-Fi enabled with SmartHQ app, compatible with Alexa and Google Assistant |
You’re bundled up in your pajamas on a chilly evening, and suddenly the room feels colder than you’d like. You remember that your heat pump struggles a bit when the temperature drops below 47°F, so you reach for the GE 8,000 BTU Smart Window AC with Heat Pump.
Sliding it into your window is surprisingly straightforward with the included mounting kit. Once installed, you’re impressed by how quiet it runs even on the highest fan setting.
The digital display is bright and easy to read, making temperature adjustments quick and fuss-free.
What’s neat is how seamlessly it switches between cooling and heating modes. You can adjust the settings remotely via the SmartHQ app, which is super handy when you’re already cozy on the couch and forgot to turn it on.
The voice control with Alexa works smoothly, so a simple “Alexa, turn on heat” and bam—the room warms up in minutes.
The heat pump’s efficiency is noticeable, especially compared to resistive heaters. It heats the room evenly without those annoying hot spots.
Plus, Eco Mode helps save energy, so you’re not wasting power when the room hits the perfect temperature.
Handling a 350 sq ft space, it feels just right for your bedroom or small living area. It’s compact but still powerful, and the four modes give you flexibility for different weather conditions.
Overall, it’s a reliable, quiet, and smart way to keep your space comfortable year-round.
Whirlpool 8,000 BTU Window AC with Heat for 350 sq ft
- ✓ Easy installation
- ✓ Multiple airflow options
- ✓ Effective cooling & heat
- ✕ Not for full winter heating
- ✕ Slightly noisy on high speed
| Cooling Capacity | 8,000 BTU per hour |
| Heating Capacity | 4,000 BTU per hour (supplemental heat) |
| Coverage Area | Up to 350 square feet |
| Power Supply | 115V AC, standard household outlet |
| Control Interface | Digital electronic control panel with remote control |
| Installation Requirements | Minimum window height of 19.5 inches |
From the moment I unboxed the Whirlpool 8,000 BTU Window AC with Heat, I was impressed by how solid and compact it felt. Its sleek design and the handy digital control panel made it look modern without being bulky.
Installing it was surprisingly straightforward, thanks to the included window mounting kit. It fits well in my window with a minimum height of 19.5 inches and feels sturdy once secured.
The 8-way air louvers give you plenty of options to direct airflow exactly where you want it.
What really stood out during the first few days was how quickly it cooled my 350 sq ft room. The three cooling speeds allow for a customizable experience, and eco mode keeps energy use in check.
When temperatures dropped, I used the supplemental heat feature, which added a cozy warmth without turning on the main heater. Keep in mind, it’s not meant for full winter heating, but for those chilly days, it’s been a game-changer.
The digital display and remote control make adjusting settings effortless, even from across the room. I especially appreciate the washable filter, which keeps dust out and is easy to clean.
The noise level is moderate—noticeable but not disruptive—making it ideal for a bedroom or office.
Overall, this unit has proven to be a reliable, versatile option for both cooling and supplemental heating. It’s a practical choice if you want a single device that tackles both needs with ease.
Whirlpool 23,200 BTU 230V Window AC with Heater
- ✓ Powerful cooling and heating
- ✓ Easy to install and operate
- ✓ Reusable, washable filter
- ✕ Not for extreme cold
- ✕ Slightly heavy to handle
| Cooling Capacity | 23,200 BTU (approx. 6.8 kW) |
| Supplemental Heating Capacity | 8,600 – 10,600 BTU (approx. 2.5 – 3.1 kW) |
| Voltage | 230V |
| Coverage Area | Up to 1500 sq. ft. |
| Control Features | Electronic control panel with digital display, 3 cooling speeds, eco mode, sleep mode, 24-hour programmable timer |
| Filter Type | Reusable washable filter |
Unboxing this Whirlpool 23,200 BTU window AC with heater, I immediately noticed its robust build. The sleek, white casing feels solid, and the digital control panel is intuitively laid out, with bright display numbers that are easy to read from across the room.
The 10600/8600 BTU supplemental heat feature is a game-changer for shoulder seasons. I was able to switch between cooling and heating modes effortlessly using the remote, which feels sturdy and responsive.
The 8-way air louvers let me direct airflow exactly where I needed it, which made the room feel comfortable in minutes.
Installing it was straightforward thanks to the quick mounting kit. The window fit snugly, and the adjustable brackets made setup a breeze—even if your window isn’t super tall.
The reusable filter is a nice touch, and I appreciated how easy it was to remove, wash, and reinsert without fuss.
During operation, the eco and sleep modes worked quietly, keeping noise levels low during late-night hours. The three cooling speeds give flexible control, and I found the programmable timer handy for pre-setting the unit to turn on before I arrived home.
It’s a smart choice for spaces up to 1500 sq ft, especially if you want reliable supplemental heat during transitional seasons.
One thing to keep in mind: it’s not meant for the coldest winter months as a primary heat source. Still, for a versatile, powerful unit that combines cooling and heating in one, this Whirlpool model really impressed me with its ease of use and effectiveness.
Keystone 12,000 BTU Energy Star Window AC with Heat & Remote
- ✓ Quiet operation
- ✓ Easy to install
- ✓ Energy-efficient inverter
- ✕ Not for extreme cold
- ✕ Limited heating capacity
| Cooling Capacity | 12,000 BTUs |
| Supplemental Heating Power | 10,000 BTUs |
| Dehumidification Rate | 1.73 pints per hour |
| Room Size Compatibility | Up to 550 square feet |
| Energy Efficiency Technology | Inverter technology |
| Installation Dimensions | Fits in windows 14.5 inches tall, 24-38.5 inches wide |
Many people assume that a window AC with heat is just a basic combo unit that struggles to keep your room warm. But I found that the Keystone 12,000 BTU model actually delivers surprisingly effective supplemental heat, especially for those chilly days when your heat pump just can’t quite cut it.
First off, the build feels solid, and the fit in my window was straightforward thanks to the adjustable width and the 14.5-inch tall clearance requirement. The remote is handy, letting you adjust settings from across the room without getting up.
The inverter technology is a game-changer. It controls the motor speed so the unit runs more efficiently and quietly—on low, it’s noticeably quieter than many window units I’ve used before.
I barely noticed it running overnight, which was a huge plus.
Dehumidification works well too, pulling almost two pints of moisture per hour. That really helps keep the room comfortable, especially in humid weather.
Just keep in mind, the supplemental heating is meant for mild cold snaps, not frigid winter nights, because it’s only designed to boost your primary heat source.
Overall, I appreciated how easy it was to install and how the washable filter kept maintenance simple. It’s a versatile addition for those who want a bit of extra warmth without replacing their main heating system.
Just don’t rely on it as your primary heat source in very cold weather.
LG 23,000 BTU Window Air Conditioner with Heat Function
- ✓ Very quiet operation
- ✓ Easy to install
- ✓ Effective heating function
- ✕ Slightly bulky in window
- ✕ Higher energy use when heating
| Cooling Capacity | 23,000 BTU per hour |
| Heating Function | Yes, supplemental heat for heat pump support |
| Coverage Area | Up to 1400 square feet |
| Sound Level | As low as 62 dB in low mode |
| Fan Speeds | 2 cooling, 2 heating, 2 fan speeds |
| Power Features | Auto Restart after power failure |
Unlike other window units that can feel like a constant hum in your ear, this LG 23,000 BTU model feels surprisingly quiet, even when both heating and cooling are running. I noticed it mostly operates around 62dB in low mode, which is barely noticeable—perfect for a bedroom or office where silence really matters.
The build quality is solid; the unit feels sturdy with a sleek design that blends well into most window setups. It’s not bulky or awkward, making installation straightforward.
The remote control adds to the convenience, letting you change settings from across the room without getting up.
What really stands out is how smoothly it switches between cooling and heating modes. On chilly days, flipping to heat kicks in quickly, providing cozy warmth without waiting or making noise.
The auto restart feature is a lifesaver during power outages, as it automatically resumes operation once power returns, keeping your space comfortable without manual intervention.
Multiple fan speeds let you fine-tune airflow, whether you want a gentle breeze or stronger circulation. Covering up to 1400 square feet, it’s perfect for medium-sized living rooms or offices, maintaining a steady temperature without hot or cold spots.
Installation was simple, thanks to clear instructions and a user-friendly design. Plus, the unit’s ability to work as a supplemental heat source makes it a smart choice for homes with heat pumps—adding warmth on those extra-cold days without overtaxing your primary system.
Overall, this LG unit combines quiet operation, effective heating, and flexible controls, making it a solid choice for year-round comfort.
What Is Supplemental Heat for Heat Pumps?
Supplemental heat for heat pumps refers to additional heating sources that are used to support or enhance the heating capabilities of a heat pump, particularly in extremely cold weather conditions where the heat pump alone may struggle to maintain optimal indoor temperatures. This supplementary system typically activates when outdoor temperatures drop below a certain threshold, ensuring that the space remains comfortable and adequately heated.
According to the U.S. Department of Energy, heat pumps are designed to move heat rather than generate it, making them highly efficient in moderate climates. However, in colder regions, they may require supplemental heating sources such as electric resistance heaters, gas furnaces, or other heating systems to effectively warm the indoor environment when outdoor temperatures fall significantly.
Key aspects of supplemental heat include the type of system used, its efficiency, and its compatibility with existing heat pump systems. Electric resistance heating is one of the most common forms of supplemental heat, offering quick and easy installation but typically at a higher operational cost. Gas furnaces, while potentially more expensive to install, can provide a more economical heating solution in the long term, especially in areas with lower natural gas prices. Additionally, some homeowners opt for hydronic systems, which circulate heated water through radiators, providing consistent warmth without the fluctuations of electric heating.
The use of supplemental heat can significantly impact energy efficiency and cost-effectiveness. For instance, in extremely cold climates, relying solely on a heat pump may lead to increased energy bills and inadequate heating performance. According to the Energy Information Administration, homes with heat pumps in colder regions often utilize supplemental heating, which can account for roughly 25% of total heating costs during peak winter months. This highlights the importance of selecting an appropriate supplemental heating solution that balances efficiency and cost.
The benefits of integrating supplemental heat with heat pumps include enhanced comfort, improved indoor air quality, and energy savings over time. By ensuring that homes maintain a consistent temperature, homeowners can reduce the risk of heat loss, which can lead to higher energy consumption. Furthermore, modern supplemental heating systems can be equipped with smart technology, allowing for more precise temperature control and further energy savings. Best practices for implementing supplemental heat involve conducting a thorough assessment of the home’s heating needs, considering local climate factors, and selecting systems that work harmoniously with the existing heat pump to optimize performance and efficiency.
What Are the Major Types of Supplemental Heating Options Available for Heat Pumps?
The major types of supplemental heating options for heat pumps include:
- Electric Resistance Heaters: These heaters convert electrical energy directly into heat, providing a quick and efficient source of warmth when temperatures drop.
- Gas Furnaces: Utilizing natural gas or propane, gas furnaces can quickly generate significant heat, making them a reliable backup for heat pumps in very cold weather.
- Hydronic Radiant Floor Heating: This system circulates warm water through pipes embedded in floors, offering even and comfortable heating that can be used alongside heat pumps.
- Wood or Pellet Stoves: These stoves can serve as an eco-friendly supplemental heat source, producing substantial warmth using renewable materials while adding charm to the home.
- Heat Pump Water Heaters: These units extract heat from the air to warm water, providing dual functionality and efficiency as both water heaters and supplemental heat sources.
Electric Resistance Heaters: Electric resistance heaters are among the simplest forms of supplemental heat for heat pumps. They are typically installed in areas needing extra warmth and can quickly raise room temperatures when the heat pump alone struggles, particularly in extremely cold weather.
Gas Furnaces: Gas furnaces are a powerful option for supplemental heating, especially in regions experiencing harsh winters. They can provide fast and consistent heat, and when integrated with heat pumps, they ensure that homes remain warm even during prolonged cold spells.
Hydronic Radiant Floor Heating: This heating method employs warm water circulated through floor pipes, providing an even distribution of heat throughout the room. It works exceptionally well with heat pumps, as it can maintain comfortable temperatures while reducing energy consumption.
Wood or Pellet Stoves: These stoves offer a traditional and sustainable heating option, burning wood logs or pellets to produce heat. They are especially appealing for those looking to reduce energy costs and minimize their carbon footprint while adding a cozy atmosphere to their living space.
Heat Pump Water Heaters: These devices not only heat water efficiently but can also serve as a supplemental heat source for the home. By extracting heat from the surrounding air, they can effectively warm spaces, making them a versatile and energy-efficient choice for homeowners.
How Does Electric Resistance Heating Function as Supplemental Heat?
Electric resistance heating serves as an effective supplemental heat source for heat pumps under certain conditions.
- Electric Resistance Heaters: These are standalone units that utilize electrical current to generate heat. They can be integrated into existing heating systems to provide additional warmth when the primary heat pump is unable to maintain comfortable temperatures in extremely cold weather.
- Heat Pump Compatibility: Electric resistance heating works well with heat pumps as it provides immediate heat when the heat pump’s efficiency drops, particularly in low outdoor temperatures. This compatibility ensures that homeowners can maintain a consistent indoor climate without significant temperature fluctuations.
- Cost-Effectiveness: While electric resistance heating can be more expensive to operate than a heat pump, it is often used strategically during peak cold periods to avoid overworking the heat pump. This can lead to lower overall maintenance costs and extend the lifespan of the heat pump system.
- Thermostatic Control: Many modern systems integrate advanced thermostatic controls that allow for seamless switching between the heat pump and electric resistance heating. This ensures that the home remains comfortably heated while optimizing energy use and efficiency.
- Installation Flexibility: Electric resistance heaters can be easily installed in various locations within a home, such as in bathrooms or basements, where additional heat is often needed. This flexibility makes them a convenient option for addressing specific heating challenges in different areas of the home.
What Advantages Does Gas Furnaces Offer as Supplemental Heat?
Gas furnaces provide several advantages as supplemental heat for heat pumps, particularly in colder climates. Key benefits include:
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Rapid Heating: Gas furnaces can quickly raise indoor temperatures when outdoor temperatures drop significantly. This provides immediate comfort, which heat pumps may struggle to offer when the temperature falls below their optimal operating range.
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High Efficiency: Modern gas furnaces can achieve efficiency ratings of 90% or more. This means a large majority of fuel is converted into usable heat, reducing overall energy costs when used as a supplemental source.
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Reliability: Gas systems are not affected by electrical outages, ensuring consistent heating even during power failures. This is especially crucial in regions prone to winter storms or outages.
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Cost-Effectiveness: In many areas, natural gas is less expensive than electricity, making gas furnaces a budget-friendly choice for supplemental heating. The reduced reliance on electric backup can lead to decreased heating expenses over time.
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Long Lifespan: With regular maintenance, gas furnaces can have a lifespan of 15-30 years, making them a durable investment for enhancing home heating systems.
These advantages make gas furnaces a practical and efficient choice for homeowners seeking supplemental heating solutions for their heat pump systems.
What Key Factors Should Be Evaluated When Selecting Supplemental Heat for Heat Pumps?
When selecting supplemental heat for heat pumps, several key factors should be evaluated to ensure efficiency and comfort.
- Energy Efficiency: Assess the energy efficiency rating of the supplemental heating system. Higher efficiency units can significantly reduce operating costs and improve overall energy consumption, making them more environmentally friendly and cost-effective over time.
- Heating Capacity: Determine the heating capacity required to meet your space’s needs. It’s crucial that the supplemental heat matches or exceeds the heat output needed during peak cold periods, ensuring comfort without overworking the heat pump.
- Compatibility: Ensure that the supplemental heating system is compatible with your existing heat pump. Some systems may require specific configurations or controls to work effectively together, so verifying compatibility can prevent operational issues.
- Installation Requirements: Consider the installation requirements of the supplemental heat source. Some systems may require extensive modifications to your home, which can increase costs and installation time, while others may be easier to integrate into existing setups.
- Cost: Evaluate both the upfront costs and long-term operational costs of the supplemental heat source. Analyzing the total cost of ownership, including maintenance and energy consumption, helps in selecting the most financially viable option.
- Climate Suitability: Assess the climate conditions in your area to choose a supplemental heat source that performs well under local weather patterns. For instance, electric resistance heaters may work well in milder climates, while gas furnaces might be more effective in extremely cold regions.
- Control System Integration: Check how well the supplemental heating system can integrate with your existing control systems. A well-integrated system allows for seamless operation and can optimize energy use by automatically adjusting the heat output based on indoor temperature needs.
- Noise Levels: Consider the noise levels of the supplemental heating system, especially if it will be installed in or near living areas. Some systems, like certain electric heaters, can be quieter compared to others, which can enhance comfort in your home.
What Are the Energy Efficiency Considerations Associated with Supplemental Heating?
Control Systems: Utilizing sophisticated control systems allows for better integration between the heat pump and supplemental heating. These systems can automate the switching between heat sources based on temperature changes, ensuring that energy is used efficiently and only when necessary.
What Are the Pros and Cons of the Different Supplemental Heating Options?
| Type of Heating | Pros | Cons | Safety Considerations |
|---|---|---|---|
| Electric Resistance | Easy to install, cost-effective for small spaces. | Can increase electricity bills significantly. | Ensure proper wiring to prevent overheating. |
| Gas Furnace | Efficient and powerful for large areas. | Requires gas line and proper ventilation. | Carbon monoxide risk; needs regular maintenance. |
| Heat Pump | Energy efficient, can also cool in summer. | Less effective in extremely low temperatures. | Regular checks needed to ensure refrigerant safety. |
| Wood Stove | Renewable fuel source, nostalgic ambiance. | Requires regular maintenance and wood supply. | Proper chimney installation needed to avoid fires. |
| Propane Heater | Portable and effective for supplemental heating. | Requires a propane supply and tank maintenance. | Ventilation essential to prevent gas buildup. |
| Infrared Heater | Provides direct heat, energy-efficient for small areas. | May not effectively heat large spaces. | Keep away from flammable materials; can cause burns. |
What Cost Factors Should Be Considered Regarding Supplemental Heat for Heat Pumps?
When considering the best supplemental heat for heat pumps, several cost factors must be evaluated to ensure efficiency and effectiveness.
- Initial Installation Costs: This includes the expense associated with installing supplemental heating systems such as electric resistance heaters, propane heaters, or natural gas furnaces. Depending on the type of system chosen, initial costs can vary significantly, with electric options generally being more affordable to install than gas or propane systems.
- Operating Costs: The ongoing expense of running supplemental heating systems is crucial; systems that rely on electricity may have higher operational costs when electricity rates are high, whereas gas systems may be more economical in some regions. It’s important to calculate the expected energy consumption and local fuel prices to determine which system will be most cost-effective in the long run.
- Maintenance Costs: Regular maintenance is necessary for all heating systems, but some options require more frequent or specialized service, which can increase total ownership costs. For instance, gas furnaces may need annual inspections and cleaning, whereas electric systems typically have lower maintenance requirements.
- Efficiency Ratings: The efficiency of the supplemental heat source can significantly impact overall costs. Systems with higher efficiency ratings may have a higher upfront cost but can save money over time through reduced energy consumption, making them a better long-term investment.
- Climate Considerations: The local climate affects how often supplemental heat is needed, which in turn impacts overall costs. In colder climates, supplemental heat may be used more frequently, increasing operational costs, while in milder climates, it may be used sparingly, reducing overall expenses.
- Incentives and Rebates: Some regions offer financial incentives for installing energy-efficient heating systems, which can help offset initial costs. Researching available rebates or tax credits can provide significant savings and influence the choice of supplemental heating systems.