Heat pumps are one option for heating and cooling homes in Montana.
In heating mode, heat pumps absorb heat from the outdoor air or the ground and transfer it indoors. In cooling mode, the process is reversed.
But there’s a common myth with heat pumps: many people think they’re better-suited for warmer climates.
Can heat pumps keep Montana homes warm in the winter? This guide explains how heat pumps perform in extreme cold and what homeowners should consider before scheduling heat pump services in Hamilton with Comfort Solutions, which has been serving communities in Ravalli and Sanders counties since 2001.
How Do Heat Pumps Transfer Heat When It Is Freezing Outside?
Two common types of heat pumps are air-source and ground-source.
Ground-source heat pumps have been a popular option for warming a home in freezing temperatures.
These units extract warmth from the ground and transfer it to your home.
How does this work with air-source heat pumps when the air is freezing? Believe it or not, even ice-cold air still has heat energy. Air-source heat pumps extract the thermal energy in the air and transfer that heat indoors.
What Makes Modern Climate Heat Pumps Different?
Early heat pumps struggled in cold weather because they lost efficiency rapidly as outdoor temperatures dropped.
While they could always provide both heating and cooling by reversing their cycle, older models were largely inefficient or ineffective as primary heaters in sub-freezing climates.
These heat pumps had unique features, such as two- and variable-speed compressors as well as a reverse-cycle defrost setting.
What Happens to Heat Pump Performance in Extreme Cold
Heat pumps rely on the transfer of heat, rather than generating heat. Since the temperature difference between your home and the outside air is massive, there’s a chance the heat pump will work harder.
When it comes to heat pumps and cold weather, remember that heat pumps aren’t always the right option for every Montana home.
How Does a Heat Pump Deal With Frost and Ice on the Outdoor Unit?
Since heat pumps pull warm energy from cool air, frost can form on the outdoor unit.
This happens during the transfer of air; transferring thermal energy can make the air colder and cause it to condense or even freeze on the outdoor coils of your heat pump.
Fortunately, most modern heat pumps include a defrost cycle. During this cycle, the heat pump will transfer warm air from your home back to the outdoor unit to melt the frost.
What Determines Whether a Heat Pump Will Work Well in a Cold Climate?
The best way for Montana homeowners to determine heat pump efficiency in cold weather is to check the manufacturer’s performance data.
Homeowners should also look for an ENERGY STAR certification.
To earn the ENERGY STAR label, the heat pump must be third-party tested in cold climates, specifically testing performance metrics at 5°F and lower.
It’s also a good idea to compare the different types of heat pumps and work with a trustworthy HVAC company to properly size and install your unit.
There are also certain features that come with a cold-climate heat pump, which we will discuss in the next section.
How Should Homeowners Choose a Heat Pump for a Severe Winter Climate?
Montana homeowners should look for specific features in a heat pump. These include:
- Vapor injection: This technology routes a portion of refrigerant vapor back into the compressor mid-cycle, maintaining mass flow rate and heating capacity even when outdoor temperatures plummet.
- Variable speed compressors: Variable speed compressors can run at multiple speeds and adjust depending on your heating and cooling needs.
- Duct or ductless: You can choose a heat pump that uses your ductwork to distribute air. Ductless heat pumps are ideal if you don’t have existing ductwork.
What Are the Biggest Limitations of Heat Pumps in Extreme Cold?
Heat pumps can be an effective heating system, but Montana homeowners should have their homes evaluated by an HVAC professional and choose a system designed for cold climates.
In Conclusion
Montana homeowners may wonder about heat pumps and cold weather, specifically if heat pumps can warm a home during the freezing-cold winters.
Cold-climate heaters can provide heating, but this depends on the equipment, size, the home’s characteristics, installation practices, and outdoor conditions.
Do you use a heat pump in your Montana home? Let us know what you think in the comments!
