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Do air-source heat pumps work in cold weather?

Friday | March 3, 2023
All News

Do Air-Source Heat Pumps Work in Cold Weather?

Published: 1/25/2023 2:00:56 PM

Does air-source heat pump performance drop along with outdoor temperatures? Lets find out.

heat pump in snow

Air-source heat pumps are being touted as the next big thing in sustainable space conditioning, and with their many benefits, it's easy to see why. Here are just a few of the advantages that air-source heat pumps have compared to conventional heating and cooling:

  • More efficient. Air-source heat pumps have heating and cooling efficiencies of up to 300% or more.
  • Quieter operation. Air-source heat pumps produce less noise than conventional HVAC systems.
  • Safer. Heat pumps use electricity, eliminating potentially hazardous emissions from furnace fuels.

Despite these benefits, many are concerned that air-source heat pump performance is not so hot at very cold temperatures. The truth is that air-source heat pumps can provide effective space heating in winter, but their performance does drop as the outdoor temperature decreases. What does that mean for you? We'll sort it all out.

How air-source heat pumps work

In winter, heat pumps move heat from the cold outdoors to the warmer indoor space. How does cold air provide heat? Hot and cold are relative terms. All outside air down to absolute zero degrees (-460°F) contains some heat. An air-source heat pump extracts some heat and moves it indoors to provide space heating. In summer, this process is reversed to provide space cooling.

How are heat pumps more than 100% efficient? They move heat rather than create it, like a conventional furnace. Even the most efficient furnace loses some heat in the combustion process.

Cold temperature performance

Air-source heat pumps do lose some efficiency and heating capacity as the outdoor air temperature decreases. Residential electric heating elements range from 5- to 10-kilowatt (kW) load, which is much higher than a typical heat pump load. For this reason, standard air-source heat pumps are not always the most cost-effective heating option in areas with extremely cold winters.

Cold climate heat pump models, however, are available. They can provide efficient and cost-effective space heating at very cold temperatures.

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  • Annual Meeting
  • Board Elections
  • My Account
    • Paperless
    • Prepay
    • Autopay
    • Levelized Budget Billing
    • Cass County Electric Mobile App
    • Understanding Your Bill
    • View & Pay Bill
    • Bill Credit
  • Request/Stop Service
  • Programs & Services
    • Business Accounts
    • Electric Vehicles
    • Contractor Information
    • Donations
    • Time of Day Rate
    • Heating Assistance
    • Off-Peak Program
    • Interconnection of Generation Systems
    • Prairie Sun Community Solar
    • Infinity Program
    • Operation Round Up
    • My Co-op Cares
  • Member Info
    • Capital Credits
    • Max Gen Resources
    • Outage Information
    • Highline Notes & North Dakota Living
    • Highline Notes Photo Submission
    • Conservation Blog
      • 101 ways to save
      • Energy Audit
    • Safety Blog
    • Recipe Blog
    • Co-op Connections
    • New Member Information
    • Call Before You Dig
    • Grant - Rural Development Finance Corporation
    • First Responder
  • Events
  • About Us
    • Contact Us
    • Governance & Document Center
    • Energy Sources & Environment
    • Rates
    • Media
    • Connect With Us
  • Youth & Ed
    • Kids Zone
    • Scholarships
    • Youth Tour
  • Co-op Careers