Increase home comfort
Our units cool in the summer and heat in the winter, so you’re always comfortable.
A healthier home
Our air con units can purify the air, catching airbourne particles and neutralising bacteria, fungi and microbes.
Correct body temperature is key to a good night’s sleep, our units can get the temperature just right in summer or winter.
Get an instant air con 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?
Our air conditioning units are of the highest quality. Bosch units come with the longest warranty and are one of the most efficient.
We provide fast and accurate quotations with no hidden fees or costs.
We offer flexible and scalable packages to suit your needs.
Friendly & professional
All our engineers are F-Gas registered, they follow strict practice guidelines.
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.
We employ our own engineers who will install your system, if an electrician is required for the installation he will also be our own employee.
We have been fitting air conditioning for a long time and know which ones are likely to cause you issues, so we’re always happy to advise. However it’s your home and we’ll fit the unit you want.
Yes we have lots of options available. This includes interest free and no deposit options.
Many air conditioning systems come with heat pump capabilities, making them suitable for both cooling in the summer and heating in the winter. This dual functionality can provide year-round comfort and energy savings. The majority of units we recommend can be used for heat.
The ideal system depends on your needs and home size. Options include split systems, multi-split systems, and ducted systems. We carry out a professional assessment of your home to determine the best fit for your specific requirements.
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.