Air Source Heat Pump FAQs
Quick, clear answers to the questions we are asked most often about air source heat pumps.
- Last reviewed: July 2026
- Reading time: 5 minutes
Key takeaway
Quick answers to the most common questions about air source heat pumps — from cold-weather performance to costs, grants and noise.
Your questions answered
Thinking about an air source heat pump naturally brings up questions, and that is exactly as it should be — it is an important decision for your home. Below are clear, straightforward answers to the questions we hear most often. If your question is not covered here, our friendly team is always happy to help.
Frequently asked questions
Do heat pumps work in cold weather?
Yes. Air source heat pumps are designed to keep working in freezing conditions and are used successfully across some of the coldest countries in the world. A correctly sized system keeps your home warm through a British winter.
Will a heat pump keep my home warm?
Yes. A properly sized and installed heat pump keeps your home comfortably warm, providing steady, even heat throughout. Our team makes sure it is sized correctly for your home.
How much does a heat pump cost?
It varies with the size of the heat pump and any changes your home needs. The most accurate way to find out is a free, no-obligation quote based on your home.
Will it lower my bills?
A heat pump is very efficient, so homes replacing older, less efficient systems often see lower running costs. Your exact saving depends on the system being replaced and how you heat your home.
Do I need to change my radiators?
Not always. Heat pumps run at a lower temperature, so some homes benefit from larger radiators or underfloor heating. We check your radiators during the free survey and advise if any changes are worthwhile.
Are there grants available?
You may qualify for government-backed support towards the cost of a heat pump, depending on your circumstances. A quick eligibility check is the easiest way to see what applies to you.
Is a heat pump noisy?
Modern heat pumps are quiet — most people compare the sound to a gently humming fridge. The outdoor unit is positioned carefully to keep any noise to a minimum.
Can it heat my hot water?
Yes. As well as heating your home, a heat pump heats your hot water, usually stored in a cylinder ready for when you need it.
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Last reviewed: July 2026 · Reviewed by: Warmr Heating Team