Air source heat pumps
Efficient, quiet heating for your home, backed by Vaillant. Tell us about your property and get a free quote.
- 20+ years
- Family-run
- Which? Trusted Trader
Get your free heat pump quote
No-obligation. A few details about your home help us price it properly. We'll call you back, usually the same working day.
Heating that costs less to run
A heat pump takes heat from the outside air and uses it to warm your home. It does the job of a boiler with far less energy.
We install heat pumps backed by Vaillant, a respected name in heating, and we size each one to your home.
- Renewable energy. Heat from the air outside.
- Up to 300% more efficient than gas boilers.
- Can be cost effective. Lower running costs over time.
- Lower carbon footprint.
- Quiet. Gentle in everyday use.
See what a heat pump could do for your home. Free quote.
A different kind of warmth
Steady, even heat
Heat pumps run at lower temperatures, so radiators feel gently warm rather than blasting hot. Comfort is calm and consistent.
Vaillant behind it
SW3 installs air source heat pumps from Vaillant, a reputable heating brand.
Specified for your home
That is why we ask about glazing, rooms and radiators in the quote form.
Ready for steady, efficient heat? Start your quote.
How a heat pump quote works
Tell us about your home
Glazing, bedrooms, bathrooms, radiators and hot water tank. It takes two minutes.
We call you back
Usually the same working day, to talk through your options.
Choose your system
Monobloc or split, with the hot water solution that fits your space.
We install
Our family-run team fits it and shows you how to use it.
Start with the form at the top of the page.
What our customers say
Real reviews from homes we've fitted.
Excellent service from initial enquiry through to completion. Paul and Chris run a great team and are hands on to ensure everything runs smoothly. Installation was carried out in just one day and we were briefed thoroughly about the system before they left. Wouldn't hesitate to recommend SW3 and so happy we found them.
A big thank you to Chris, Paul, and the whole team at SW3 Green Energy Services Ltd! A couple of months ago, I had a 15-panel solar system installed, complete with microinverters and a Powerwall battery. I'm already seeing real savings, especially with being able to make the most of off-peak rates and getting good returns from my energy provider's export rates.
What really impressed me about SW3 Green Energy was their reliability and professionalism. They were on top of everything from the first quote to the final paperwork. My setup was a little complex, with specific requirements around the placement of the Gateway and Powerwall, plus integration with my Zappi EV charger. They handled it all seamlessly.
Even when my energy provider botched the smart meter installation, leaving my system down, Chris came back to sort things out and got it up and running again.
SW3 installed an excellent system to our home and provided exceptional service. They prioritise customer satisfaction. They strived to meet even our bespoke requests and their rates are fair. Kudos to Chris for the wonderful process from the initial discussion til post-installation, and for always keeping me updated. Kudos also to Matt who installed our system and who was really hardworking and knowledgeable. I would definitely recommend SW3 to everyone.
Join them. Get a free, no-obligation quote from the same team.
Questions people ask us
What type of air source heat pump should I choose?
There are two main types: monobloc and split.
A monobloc keeps all the components in one outdoor unit. Pipes carry water to your central heating, and a hot water cylinder sits inside. Monobloc systems usually cost less, install faster and take up less room indoors, but are slightly less efficient.
A split system divides the components between an indoor and an outdoor unit. Some heat transfer happens indoors, where it is warmer, so there is less heat loss and efficiency can be higher.
The right choice depends on your budget and space.
Do I have space for an air source heat pump?
You need a suitable outside spot, on a wall or on the ground, with enough space around the unit for good airflow.
If indoor space is not a concern, a split system may be worth the extra cost. We will talk you through the options.
What if I have no outdoor space, for example in a flat?
Compact heat pumps suit small, well-insulated modern flats and homes. They need a cupboard of about 80cm x 80cm, ideally near an outside wall.
For park homes or small flats, an air-to-air heat pump can work. Where heating is shared communally, other solutions may suit better.
How do I store hot water?
A heat pump does not make instant hot water like a combi boiler, so you need to store it. A hot water cylinder sized to your household needs a cupboard of at least 80cm x 80cm.
If space is tight, a hybrid system uses the heat pump for heating and a boiler for hot water. A heat battery takes less room than a cylinder, and instantaneous heaters can fit under a kitchen sink for a smaller supply.
Will my radiators feel different?
Yes. Heat pumps run at lower temperatures than gas or oil boilers, so radiators feel gently warm rather than hot. The heat is steady and lasts.
Not sure what suits your home? Ring or send the form.
Ready for low-carbon heating?
Tell us about your home and we will come back with a free, no-obligation quote.