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Bettesworth Construction
Energy Efficiency

What Is a Heat Pump? How It Works, Types, and What to Know Before Installing One

A heat pump moves heat to heat or cool a home. Learn how the main system types work and what to evaluate before installation.

By Bettesworth Construction Team 4 min read
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A heat pump is an electrically powered heating and cooling system that moves heat instead of making it by burning fuel or using electric resistance. In winter, it draws heat from outdoor air or the ground and moves it indoors; a reversible system can move indoor heat outside in summer. Whether one is a good fit depends on the home, climate, equipment and installation.

How does a heat pump work?

A heat pump uses a refrigeration cycle to collect heat in one place and release it in another. In heating mode, it takes heat from outdoor air or the ground and transfers it into the home. In cooling mode, the cycle reverses and carries indoor heat outside, much like an air conditioner.

Because it transfers heat rather than generating it, a heat pump can deliver more heat energy than the electricity it consumes. ENERGY STAR says a certified air-source heat pump can deliver up to three times as much heat energy as electrical energy used. That general efficiency description is not a promise of a particular household’s bill savings.

What kinds of heat pumps are there?

Heat pumps differ in where they collect heat and how they distribute conditioned air. The best configuration depends on the property and the work involved.

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#1 Best Overall
Senville LETO Mini Split Air Conditioner, Heat Pump, White, 12000 BTU
  • Alexa Enabled Mini Split AC/Heating System: Integrate with voice control or app, allowing you to adjust your mini split air conditioner from anywhere. Set routines for temperature changes.
  • Versatile 4-in-1 Mini Split: All-season solution with air conditioning, heat pump (functional up to 5F/-15C), dehumidifier, fan, and turbo function. Includes a DC Inverter that's UL Listed, AHRI Certified, and works with Alexa.
  • Stylish & Functional Mini Split AC: Suitable for both home and business. Provides performance without compromising aesthetics. Ideal for bedrooms, living areas, stores, eateries, and warehouses.
  • Installation Package Included: Includes indoor air handler, outdoor condenser, remote control, and installation kit with a 16ft. line set and communication wire. Pre-loaded with refrigerant for up to 25 ft. Note: Professional installation required.
  • 5 Year Manufacturer's Warranty: Includes 5 years on parts replacement and 5 years on the compressor. Senville offers complimentary technical assistance. Labor not included.
Type How it exchanges and distributes heat Where it may fit What to compare
Ducted air-source Exchanges heat with outdoor air and distributes indoor air through ducts. A home with usable ductwork. Cold-weather capacity, duct condition, certified efficiency, sizing and backup heat.
Ductless mini-split Exchanges heat with outdoor air and delivers it through one or more indoor heads, without conventional ducts. A home without ducts, an addition, or a space needing zoned or supplemental heating and cooling. Number and placement of heads, intended coverage, certified performance, installation and service.
Ground-source (geothermal) Uses a buried loop to exchange heat with the ground. A project with suitable site conditions, often new construction or a major renovation. Loop design, land and site needs, initial installation cost and long-term energy economics.
Absorption Uses thermal energy rather than a standard electrically driven compressor. Specialized applications. Energy source, equipment complexity and local installer availability.

Ground-source systems use relatively stable ground temperatures, but the U.S. Department of Energy notes they commonly cost more to install than air-source systems. DOE’s 2021 geothermal consumer guide describes energy consumption 25% to 50% lower than air-source heat pumps; that range is guide context, not a guaranteed result for a particular project. Site work, design, energy prices and incentives affect the comparison, so there is no universal payback period.

Can a heat pump work in a cold climate?

Cold-weather performance depends on the specific model and the home. ENERGY STAR’s cold-climate air-source heat-pump certification verifies performance at 5°F. ENERGY STAR says systems continue operating below that temperature, while backup heat may be useful to heat most efficiently at still lower temperatures.

Rank #2
Midea 12,000 BTU Window Air Conditioner with Heat, 550 Sq Ft
  • 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!

When comparing systems for a cold location, ask about the equipment’s low-temperature heating capacity and efficiency, defrost operation, and the plan for backup heat. An installer should also assess whether air sealing or other weatherization work would help the home retain heat.

How efficient is a heat pump?

Efficiency comparisons only mean something when the alternative is clear. DOE says current air-source heat pumps can reduce electricity use for heating by up to 75% compared with electric resistance heating. This is not a guaranteed saving against a gas or oil furnace, or a prediction for every home. Actual energy use and bills depend on climate, the building envelope, distribution system, energy rates, sizing and installation.

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Rank #3
Temprium 12000 BTU Mini Split Air Conditioner, 115V 22 SEER2 AC & Heat Pump
  • 【Unmatched Energy Efficiency with 22 SE2ER2】 Slash your utility bills with our advanced Inverter technology and industry-leading 22 SEER2 rating. Unlike standard units that constantly stop and start, our DC Inverter compressor adapts its speed to maintain the perfect temperature with minimal energy consumption. Paired with eco-friendly R32 refrigerant (GWP 675), this 115V mini split system delivers powerful 12,000 BTU cooling and 12,300 BTU heating while being kind to the environment. It's the smart, green choice for your home.
  • 【Powerful & Fast Year-Round Comfort】 Designed for spaces up to 750 sq. ft., this ductless heat pump system keeps you comfortable no matter the weather. Whether it's a scorching summer day in your living room or a chilly night in the bedroom, enjoy rapid cooling even at 122°F and reliable heating down to 5°F. Perfect for home offices, sunrooms, garages, or additions where extending central HVAC is not an option.
  • 【Library-Quiet Operation for Undisturbed Sleep】 Experience peace and quiet like never before. With noise levels as low as 23 dB (quieter than a whisper!), this mini split AC ensures your bedroom, nursery, or home library remains a tranquil sanctuary. Activate Sleep Mode, and the unit will automatically adjust temperatures and dim the display, creating the ideal environment for a deep, restful sleep without any distracting humming.
  • 【Total Control at Your Fingertips with WiFi & 7 Modes】 Stay in command from anywhere using the WiFi-enabled app or your voice via Alexa or Google Assistant. Forgot to turn off the AC? Use your phone. Want it cool before you arrive home? Schedule it. Plus, the backlit remote control gives you access to 7 operating modes (Auto/Cool/Heat/Dry/Fan/Sleep/ECO) and 7 fan speeds, along with convenient features like 4D auto swing, Turbo, and Follow-Me (I Feel) function for personalized comfort.
  • 【Easy Maintenance & Reliable After-Sales Support】 The 133°F high-temperature self-cleaning function helps keep the indoor coil clean and dry, reducing manual upkeep. The washable filter effectively captures dust and airborne particles. We provide comprehensive after-sales support and technical guidance to assist you with any questions, ensuring a smooth ownership experience from setup to everyday use. Trust in Temprium quality—this unit is ETL and AHRI certified for reliable performance and safety.

For a useful comparison, have the installer explain the proposed model’s certified efficiency and expected performance under local conditions, alongside the current system and the home’s heating and cooling needs.

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What should you consider before installing one?

Start with the property, not a product listing. The system needs to be selected for the home’s loads and distribution, then installed to suit the design. DOE warns that poor sizing and selection can reduce performance, comfort and efficiency; ENERGY STAR advises working with a professional installer.

Rank #4
Senville LETO Mini Split Air Conditioner, Heat Pump, White, 24000 BTU
  • Alexa Enabled Mini Split AC/Heating System: Integrate with voice control or app, allowing you to adjust your mini split air conditioner from anywhere. Set routines for temperature changes
  • Versatile 4-in-1 Mini Split: All-season solution with air conditioning, heat pump functional up to 5F/-15C, dehumidifier, fan, and turbo function. Includes a DC Inverter that's UL Listed and AHRI Certified
  • Stylish & Functional Mini Split AC: Suitable for both home and business. Provides performance without compromising aesthetics for bedrooms, living areas, stores, eateries, and warehouses
  • Installation Package Included: Includes indoor air handler, outdoor condenser, remote control, and installation kit with a 16ft. line set and communication wire. Pre-loaded with refrigerant for up to 25 ft. Note: Professional installation required
  • 5 Year Manufacturer's Warranty: Includes 5 years on parts replacement and 5 years on the compressor. Senville offers complimentary technical assistance. Labor not included
  • Distribution: Determine whether existing ducts are suitable or whether ductless heads make more sense. For a mini-split, decide whether it is intended for a room, supplemental use or whole-home heating and cooling; ENERGY STAR says mini-splits can serve either supplemental or whole-home roles depending on needs.
  • Climate performance: Compare cold-weather capacity and efficiency for the actual model, not just a general claim about heat pumps.
  • Load and sizing: Ask the installer to assess the home, distribution system, heating and cooling loads, and local design temperatures. Do not size solely by floor area or a retail listing.
  • Backup heat: In colder conditions, clarify what backup system is included or recommended, when it operates and how it affects comfort and operating costs.
  • Installation and service: Confirm the installer’s plan for equipment placement, distribution, commissioning and ongoing service. Installation quality affects performance.
  • Incentives: Check current local utility, government and manufacturer programs, and verify eligibility for the exact model and project. Offers and rules change by place and date.

For ENERGY STAR’s guidance on selecting a certified cold-climate model and discussing backup heat, see ENERGY STAR: Air-Source Heat Pumps. For sizing and selection considerations, see the U.S. Department of Energy’s air-source heat pump guidance.

Best Value
BLACK+DECKER Smart Portable Air Conditioner with Heat, 14,000 BTU, White
  • Four-in-One Unit: Our 14,000 BTU ASHRAE (10,200 BTU SACC) air conditioner also offers 10,000 BTU Heat for cold winter months. Portable AC with heat also functions as a dehumidifier & fan
  • Portable AC: Take this personal air conditioner (16.5” x 14.06” x 27.09) in rooms up to 700 sq. ft. Stay cool in the hot summer months and sleep well with this BLACK+DECKER ac unit for bedroom
  • Smart AC with Voice Control: This smart air conditioner allows Wi-Fi connectivity and can be controlled using our mobile app available on iOS and Google Play stores, and voice controlled by Amazon Alexa or Google Assistant
  • Follow Me Remote: Our portable AC unit comes with a full function remote control that features a FOLLOW ME function, which allows the remote to act as a thermostat for precise temperature control
  • Installation Kit: When it comes to fans that blow cold air, this indoor ac unit includes an easy-to-install window kit. A large, vented airflow outlet ushers in cool air

What should you ask an installer?

  • How will you determine the home’s heating and cooling loads and local design temperatures?
  • Is the proposed system intended to heat and cool the whole home or only selected spaces?
  • What capacity and efficiency does this exact model provide at low outdoor temperatures?
  • How will existing ducts, insulation and air leakage affect the design?
  • What backup heat is planned, and under what conditions will it run?
  • Which current incentives apply to this exact equipment and installation, and what are the eligibility deadlines?

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.

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