Northland homeowners put air source heat pumps to the test

July 2025 

An air source heat pump or ASHP is a type of HVAC system that provides both heating and cooling. It works by extracting heat from the outdoor air (even during winter) and moving it indoors to warm your home, or reversing the process to cool your home in the summer. By moving heat versus generating it the old fashioned way, ASHPs provide a more energy efficient option.

But how do ASHPs work in Minnesota’s cold climate? What are the challenges and opportunities for homeowners interested in this exciting and evolving technology? Minnesota Interfaith Power and Light (MNIPL), a nonprofit organization with a goal of creating a sustainable and just world, was awarded a CERTs Seed Grant to find out! 

Heat Pump Helpers, assemble! 

Bret Pence, Greater Minnesota director for MNIPL says the idea for Heat Pump Helpers came about after fielding inquiries from their northeast Minnesota community partners about heat pump technology.

“We were hearing a lot of questions. They were curious about the products. They were curious about contractors. They were curious about if they worked in really cold places like Duluth,” he recalls.

Partnering with Just Housing, a Duluth-based organization focused on creating green housing solutions, the ‘Heat Pump Helpers project’ was launched to learn more. 

"It was such a pleasure to partner with MNIPL on Heat Pump Helpers. Their presentation breaks down ASHPs in such an accessible way that anyone can understand how one might work in their home."
 

— Nik Allen, Northeast CERT Regional Coordinator

Drumroll, please? The results are in!

MNIPL shared three major findings from the project:

  1. Most homes can technically accommodate ASHPs, even older homes in a cold climate.
  2. While there are some basic metrics that can assist homeowners to assess ASHP suitability, a whole home evaluation with clients is ideal to determine those best interests.
  3. A home evaluation will be most effective for the homeowner if it is then followed by personal assistance and support with contextual interpretation, contractor recommendations, and incentive/finance information.

MNIPL and Just Housing presented the project findings to the public hoping that these insights will help guide future outreach, resources, and energy efficiency efforts across the region.

Randy Williams surveys the indoor air quality inside a home, as a part of the assessment.

Bret Pence says the project opened his eyes to how quickly the technology is evolving and how creatively it can be applied.

“What surprised me the most was how flexible all kinds of heat pumps were becoming before our eyes while we were working with the homeowner group. Air to water heat pumps, packaged window heat pumps, and heat pump water heaters are three applications that jump to mind,” he recalls. “The question became not if heat pumps could be used in an older home in northern Minnesota. But, ‘How do we best use heat pump technology in a particular home to meet the homeowner’s goals?’”

Not only did the seed grant partners, the homeowners, and public benefit from this project. CERTs staff gained a thing or two as well!

“It was such a pleasure to partner with MNIPL on Heat Pump Helpers,” shares Nik Allen,  Northeast CERT Regional Coordinator. “I often struggle to explain the intricacies of ASHPs and financial incentives, but their presentation breaks it down in such an accessible way that anyone can understand both how heat pumps work and also get an idea how one might work in their home.”

Want to add an ASHP to your home?

Find out what you need to know.

Project Snapshot

Clean Energy Focus: Heat Pumps

Northeast CERTs Grant: $5,000

Energy Savings: 54,500,000 BTUs

Communities Served: Duluth Metro

People Reached and Involved: 65 adults

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