£7500 grant available
Government grants of £7500 are available to homeowners upgrading from an inefficient old boiler.
Carbon & bills reduction
Heat Pumps significantly reduce your CO₂ emissions compared to oil or gas boilers. This means you will also save on your energy bills.
Increase home comfort
Installing a heat pump will enable you to improve the comfort levels of your home by maintaining a comfortable indoor temperature throughout the year.
Get an instant heat pump quote now
How it works
Answer a few quick questions to get an online estimate in seconds, including installation options and product details
Our team will arrange a free, no obligation, home assessment at a time that suits you with one of our trained engineers to discuss which installation options will best suit you and your home.
Our experienced installation team will arrive at a date and time that suits you and will look after your installation from start to finish.
Why choose us?
All of our heat pumps are of the highest quality. We choose all products based on performance & reliability, not lowest price.
We provide fast and accurate quotations with no hidden fees or costs.
We offer flexible and scalable packages to suit your needs.
Friendly & professional
Our engineers all carry the correct qualifications for any work they carry out.
Our head office is in Fareham, we cover Portsmouth, Southampton, Bournemouth, Brighton on the south coast. We go north as far as Basingstoke and Farnborough.
We are an independent family owned and run company. Ian and Louise Simm are the company owners, their son and daughter both work for the company.
A key part of the process with us is ensuring a heat pump is right for you and your home. We will assess this early on in the process and advise accordingly.
We are not tied to any manufacturers. We do have products we recommend and we’re happy to explain the reasons why. However it’s your home and we’ll fit the equipment you want.
An air source heat pump (ASHP) is a renewable heating system that extracts heat from the outdoor air and uses it to heat your home. It operates on the principle of refrigeration, transferring heat from a low-temperature source (the outside air) to a higher-temperature space (your home) using a compressor and a refrigerant cycle.
Heat pumps offer several benefits, including reduced heating bills, lower carbon emissions, eligibility for government incentives like the Boiler Upgrade Scheme (BUS), and the ability to provide both heating and cooling. They are also low-maintenance and can be a more eco-friendly alternative to traditional heating systems.
What our customers say
Everything went to plan
After getting a number of quotes for a new boiler, we chose Diamond Green Energy and I’m so pleased that we did.
Great installation and customer service
The team at Diamond have been great from start to finish. We’re so pleased with our air conditioning.
Really pleased with the end result
No pushy salesperson, just a genuine solar expert giving us all the facts and figures so that we could make an informed decision.
The cost savings are huge
The job was far from straightforward and Diamond exceeded our expectations with their technical knowledge.
Diamond were quick and professional
Diamond were quick and professional from the initial enquiry, right through to completing the install.
The service has been impeccable
I’ve been a WarmCare customer for nearly 8 years. The service has been impeccable.
Thanks all for great service
Diamond were great and only wanted us to get what we needed. Thanks all for great service.