Can I Have an Air Source Heat Pump If I Have a Combi Boiler?

Published: July 2026

Reading Time: 3 minutes

Introduction

If you currently have a combi boiler, you may wonder whether an Air Source Heat Pump is an option for your home.

The answer can be yes, but switching from a combi boiler to a heat pump is not simply a case of replacing one appliance with another. Your home’s heating and hot water system needs to be considered as a whole.

1. What Happens to Your Combi Boiler?

When an Air Source Heat Pump is installed as your main heating system, your existing gas combi boiler would normally be replaced rather than continuing to operate alongside it.

Your approved installer will assess your current system and explain what changes would be needed.

2. What About Hot Water?

This is one of the biggest differences.

A combi boiler heats water as you need it, whereas an Air Source Heat Pump normally works with a hot water cylinder.

If your home doesn’t currently have a cylinder, one may need to be installed.

3. Your Radiators May Need Checking

As we’ve discussed in earlier articles, Air Source Heat Pumps generally operate at lower temperatures than traditional boilers.

Your installer will therefore assess your radiators and heating system to make sure they are suitable.

Could Government Funding Help?

If you meet the eligibility requirements, the Boiler Upgrade Scheme (BUS) may provide Government funding towards an eligible Air Source Heat Pump installation.

At Lifetime Savings, we’ll help you understand whether the scheme could apply to your home.

Why Speak to Lifetime Savings?

Changing from a combi boiler to an Air Source Heat Pump can seem complicated.

That’s where we can help.

We’ll start with a free eligibility assessment, explain the Government funding that may be available and, if your home appears suitable, introduce you to one of our trusted approved installation partners.

They can then carry out a professional survey and explain exactly what changes your home would need.

Key Takeaways

• Having a combi boiler doesn’t automatically rule out an Air Source Heat Pump.

• Your existing heating system will need to be assessed.

• A hot water cylinder may be required.

• Some radiators may need upgrading.

• Government funding may be available through the Boiler Upgrade Scheme (BUS).

Did You Know?

Many homeowners with combi boilers initially worry that switching to an Air Source Heat Pump will be too complicated. A professional assessment can quickly establish what would actually be involved in your particular home.

Conclusion

If you have a combi boiler, don’t assume an Air Source Heat Pump isn’t suitable for you.

Lifetime Savings can provide a free eligibility assessment, explain the Government funding available and, where appropriate, introduce you to a trusted approved installer who can assess your property.

It’s a simple way to find out what is possible before making any decisions.

Related Articles

• Can an Air Source Heat Pump Provide Hot Water Too?
• Do Air Source Heat Pumps Need Special Radiators?
• Can an Older Home Have an Air Source Heat Pump?
• What Happens During an Air Source Heat Pump Installation?

About the East of England Air Source Heat Pump Guide

The East of England Air Source Heat Pump Guide is produced by Lifetime Savings, helping homeowners across the East of England understand Government funded energy improvements.

We provide free eligibility assessments, explain the available Government schemes and introduce eligible homeowners to trusted approved installation partners. Our aim is to make the process simple, clear and straightforward.

Check Your Grant Eligibility Today