How EPC Ratings Improve with Air Source Heat Pump Installation
If you’re a homeowner or landlord you may have come across the term EPC rating when selling, renting, or upgrading your property. But what does it actually mean, and how can an air source heat pump (ASHP) help improve it?
What Is an EPC Rating?
An Energy Performance Certificate (EPC) is essentially a report card for your home’s energy efficiency. Properties are graded from A (very efficient) to G (very inefficient). The certificate also includes:
- Estimated energy costs
- Carbon emissions
- Recommendations for improvements
- Potential rating after upgrades
In the UK, you need an EPC if you’re selling or renting a property. For landlords, there are minimum standards, and future regulations are likely to push rental properties towards EPC band C.
A good EPC rating isn’t just a legal requirement — it can also help you save money on energy bills, attract tenants or buyers, and reduce your property’s environmental impact.
Why Air Source Heat Pumps Make a Difference
Air source heat pumps are one of the most effective ways to improve your EPC rating. Unlike traditional boilers, ASHPs use electricity to extract heat from the outside air and transfer it indoors. This means they are highly efficient and far more sustainable.
Here’s how they help:
1. Energy Efficiency
ASHPs can deliver three to four units of heat for every unit of electricity used. EPC assessors reward this level of efficiency, which can lift your rating by a band or two.
2. Lower Carbon Emissions
Since ASHPs produce significantly fewer emissions than gas or oil boilers, they directly improve the environmental impact part of your EPC score.
3. Renewable Heating Technology
Being classified as renewable energy, ASHPs are viewed very positively by EPC assessors. Properties that utilize renewable technologies often achieve better ratings than those that rely solely on fossil fuels.
4. Reduced Dependence on Gas or Oil
Replacing an old boiler with an ASHP reduces your reliance on fossil fuels. This not only future-proofs your home against rising energy costs but also contributes to a higher EPC score.
How Much Can Your EPC Improve?
While every home is different, many properties see an improvement of one or two EPC bands after installing an ASHP — especially when combined with good insulation or radiator upgrades. For example:
- Homes rated E or D may reach C or higher
- Properties with older heating systems often see the biggest gains
- Landlords can meet or get closer to future EPC regulations
Why Professional Installation Matters
It’s important to remember that simply installing a heat pump isn’t enough. The system needs to be designed and installed correctly to maximise efficiency and EPC improvements. Factors like radiator size, insulation levels, and heat loss all make a difference.
How Wimbledon Heat Pumps Can Help
At Wimbledon Heat Pumps, we specialise in tailored ASHP installations that are designed to deliver maximum energy efficiency and comfort.
We can help you by:
- Carrying out a full heat loss and property assessment
- Designing a system that fits your home perfectly
- Advising on insulation or radiator upgrades if needed
- Installing high-performance ASHPs to MCS standards
- Helping you save money on energy bills while improving your EPC rating
Whether you’re a homeowner wanting to cut bills or a landlord aiming to meet compliance standards, our team will guide you every step of the way.
If you’re considering an air source heat pump, now is the perfect time to act. With the right installation, you can make your home more energy-efficient, eco-friendly, and future-ready. Contact Wimbledon Heat Pumps today for a consultation and see how an expertly installed ASHP can benefit your property.