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Dave Lennox Signature® Collection


Multi-Stage Heat Pump

The quietest and most efficient two-stage heat pump you can buy

XP21 Heat Pump
Price Guide
Efficiency Rating (SEER)
up to 19.2
Efficiency Rating (SEER 2)
up to 17.8
Efficiency Rating (HSPF)
up to 9.7
Efficiency Rating (HSPF2)
up to 8.2
Energy Star®

All Dave Lennox Signature® Collection models come with a 10-Year Limited Warranty on compressor and covered components. For more information, visit

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Illustration of Everything’s perfectly balanced

Everything’s perfectly balanced

Everything’s perfectly balanced

The XP21’s multi-stage operation allows it to match energy use with heating and cooling power, keeping your comfort and efficiency in perfect balance. 

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Heating, cooling, peace and quiet

The XP21’s SilentComfort™ technology greatly reduces operating noise, making it the quietest multi-stage heat pump you can buy.  Even when installed outside a bedroom window, it lets you rest peacefully.

Heating, cooling, peace and quiet
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Very pleased electrical usage was less than 1/2 from before unit was installed.

-FredH, Oregon City, Oregon
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Powerful energy savings

With efficiencies of up to 19.20 SEER and an HSPF of up to 9.70, the XP21 can lower your energy bills by hundreds of dollars a year, while still keeping your home comfortable and quiet.

Powerful energy savings
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Leading the way in smart energy use

Advanced engineering in the XP21 means enjoying smart, energy-efficient comfort all year long. This product has been designated as one of the Most Efficient ENERGY STAR certified products in 2022. Products that are recognized as the Most Efficient of ENERGY STAR in 2022 prevent greenhouse gas emissions by meeting rigorous energy efficiency performance levels set by the U.S. Environmental Protection Agency.

Learn more about Lennox awards for innovative initiatives in product design.

Leading the way in smart energy use
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Dual-fuel compatibility

Pairing the XP21 with a Dave Lennox Signature® Collection furnace gives you a system that can switch back and forth between electricity and gas, keeping you warm with whichever energy source is most efficient.

Dual-fuel compatibility
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Everything comes together perfectly

Together with other products from the Dave Lennox Signature® Collection, the XP21 takes comfort to an entirely new place.

Get details on the Ultimate Comfort System™

Everything comes together perfectly

Ratings & Reviews

See what other customers are saying about
XP21 Heat Pump

5 Stars 5/5
April 11, 2024

5 Stars 5/5


November 05, 2023

Best heat pump I've ever had. Hope it lasts. Only time will tell

Green check mark

Yes, I recommend this product.


Lewes, Delware

Age: Over 65`

Gender: Male

Reason for Replacement: Emergency

Warranty Satisfaction:
5 Stars 5/5
October 13, 2023


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  • Air Handler
    An air handler, or air handling unit, is the indoor part of an air conditioner or heat pump that moves cooled or heated air throughout the ductwork of your home. It is usually a large metal box containing important elements of an HVAC system that controls airflow and filtration. Lennox® air handlers are among the most efficient and quietest you can buy.
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  • Central Air-Conditioning
    Central air conditioning (or central A/C) is a system in which air is cooled at a central location and distributed to and from rooms by one or more fans and ductwork. Lennox® central air conditioners are among the quietest and most energy-efficient units you can buy.
    Learn More
  • Compressor
    An AC or heat pump compressor is the part of an outdoor air conditioner or heat pump that compresses and pumps refrigerant to meet household cooling requirements.
    Learn More
  • Condenser
    A condenser (or AC condenser) is the outdoor portion of an air conditioner or heat pump that either releases or collects heat, depending on the time of the year.
    Learn More
  • Decibel (dB)
    A decibel (dB) is a unit used to measure the relative intensity of sound. For example, sound levels in a library are normally about 40 dB, normal conversations range from about 50 to 60 dB, and an operating motorcycle or garbage truck can be as high as 100 dB.
    Learn More
  • Dry-Charged Unit
    An air conditioner or heat pump that is shipped dry and charged with refrigerant at the place of installation. Dry-charged units are appropriate for homeowners who need a replacement unit compatible with R-22 refrigerant.
    Learn More
  • Dual-Fuel
    A comfort system that pairs an electric heat pump with a gas furnace and alternates between the two fuel sources to maximize comfort and efficiency.
    Learn More
  • Energy Star®
    ENERGY STAR® is a program of the U.S. Environmental Protection Agency (EPA) designed to help consumers and businesses save money by choosing energy-efficient products and technologies. Heating, ventilation and air-conditioning (HVAC) equipment with the ENERGY STAR® label meets or exceeds federal guidelines for energy-efficient performance.
    Learn More
  • Grid-Tie Inverter Solar System
    A grid-tie inverter solar system is the most common and least expensive of all residential solar systems. It allows homeowners to use their own solar-generated electricity to save energy and reduce costs. The utility company’s grid, or network of power stations, serves as the backup power source.
    Learn More
  • Heat Pump
    A heat pump is an HVAC unit that heats and cools by extracting and transferring heat. Unlike traditional air-conditioners, heat pump systems have the ability to both cool a home during the summer months and heat it during winter. They do this through a reversible refrigerant cycle within the system. During cold weather, a heat pump extracts from outdoor air and transfers it inside to warm the home. This same process is reversed during warm weather for cooling, with the heat pump extracting heat from inside and transferring it outside.
    Learn More
  • Heating Seasonal Performance Factor (HSPF)
    The heating efficiency rating for heat pumps. The higher the rating, the more efficient the heat pump.
    Learn More
  • iComfort®–Enabled
    An iComfort®–enabled product is one that is designed to work with an iComfort® programmable thermostat as part of an advanced home comfort system. When you choose a heating, cooling or humidity control product that’s iComfort-enabled, you’re ensuring a higher level of home comfort and control.
    Learn More
  • Net Metering
    A service available from many utility providers in which homeowners get full retail value for most, if not all, of the electricity produced by their own generating system. A utility meter keeps track of the “net” difference between the electricity used from the utility provider and the electricity produced by the homeowner’s system.
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  • Off-Grid Or Off-The-Grid
    An off-grid or off-the-grid system is an electricity-generating system that operates independently from the utility grid, providing all of the electricity needed in the home, and is generally more expensive than grid-tied system ideal for homes located in remote areas without utility service, or where installing power lines would be extremely costly.
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  • R-22 Refrigerant
    The old standard for residential air conditioners, now being phased out by the U.S. EPA. Lennox offers dry-charged units for those who still have R-22 compatible systems.
    Learn More
  • R-410A Refrigerant
    A chlorine-free refrigerant that meets the U.S. EPA's newest, most stringent environmental guidelines.
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  • Refrigerant
    A chemical that produces a cooling effect while expanding or vaporizing. Most residential air-conditioning units contain the standard R-22 refrigerant, or freon.
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  • Refrigerant Lines
    Two copper lines that connect the outdoor air conditioner or heat pump to the indoor evaporator coil.
    Learn More
  • Scroll Compressor
    A specially designed compressor that works in a circular motion, as opposed to up-and-down piston action.
    Learn More
  • SEER

    Simply put, this rating measures how much energy a heating and cooling system uses to operate. Learn how you can use SEER and SEER2 ratings to increase efficiency – and savings – in your home.

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  • SilentComfort™ Outdoor Fan Motor
    Describes a motor with electronic sensor technology that helps optimize overall system performance while keeping sound levels low. Used in select Lennox® outdoor air conditioners or heat pump units.
    Learn More
  • * Efficiency ratings established per AHRI’s test standard: ANSI/AHRI 210/240-2017 of two-stage central AC/HP equipment as published in AHRI (December 2019).
Energy Star

Proper sizing and installation of equipment is critical to achieve optimal performance. Split system air conditioners and heat pumps (excluding ductless systems) must be matched with appropriate coil components to meet ENERGY STAR criteria. Ask your contractor for details or visit

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