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Claim this listing4.8
44 Google reviews
1–2 days
Typical install time
£7,500
BUS grant amount
Adlar Limited is an MCS certified air source installer based in Surrey. They are registered with the Boiler Upgrade Scheme, meaning they can help you claim up to £7,500 towards your installation.
Based in Surrey, GU10 2DZ
Areas served:
4.8
44 Google reviews
Based on verified Google reviews
stephen bolton
Rich John and Isaac fitted our system. From moment one to the end they were a delight to have in our home. Fantastic guys. Fantastic job. Can’t fault a thing. Office back up was also always there, but not needed. Or should I say I only contacted it with needless queries that were answered even out of hours. Thanks guys! And from Molly too!
Hussain Saiger
Richard,John and Isaac came to my house to install the Adlar air source heat pump. Whilst I am yet to benefit from the heat pump, but I would say these guys were truely professional. They were very friendly, helpful, supporting and patient. They did a very clean job. I would recommend them without hesitation.
Greg Megg
Adlår Castra cant recommend them enough! What an amazing team. Adlår are new to the UK and a dual heat pump meaning you are able to run heating and hot water independently. The lads were here on time both days and very conscientious while doing the installation. Will be telling everyone about Adlår Castra. Thanks guys.
Daniel Davidson
Couldn't rate the experience of Adlar Castra highly enough. From initial meeting through installation and after care it has been fantastic. Prompt and knowledgeable response to any questions we had and one year after installation the whole system has run perfectly.
Michael Mossman
Adlår Castra are an interesting company, they have good equipment, some very good staff, but seem to be in start up mode. They are disorganised at times and don't always follow up when they should. The process was to have a visit from an engineer who scoped the fitting of air source heat pumps to my house. This enabled him to send me a technical proposal and quote for installation. It took a long time to get a response to my questions, then I paid a small deposit to get a preinstallation visit. This resulted in some changes to the technical solution. Once I agreed to go ahead, I had to apply for the government subsidy, but they did most of the work. On the installation day, the two plumbers and the electrician were excellent, well trained, capable of troubleshooting and able to adapt to best use the installed system. They further optimised the system, efficiently installed the equipment and did a good clean up job with a minimum of inconvenience. I am pleased with the system, I could do with more information on how to optimise everything, and I am still waiting for the old oil boiler to be removed.
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We are MCS‑certified and registered with an approved consumer protection/competent person scheme, which is essential for quality assurance and to access grants like the Boiler Upgrade Scheme (BUS).
We carry out a detailed home assessment, including property type, insulation levels, existing heating system and available outdoor space, to confirm whether a heat pump is a good fit.
We design the system using a heat‑loss calculation for your home, then match the correct kW size and model (for example, air‑source vs ground‑source) so it runs efficiently and reliably.
Our fixed quote clearly lists the heat pump, cylinder, controls, labour, scaffolding (if needed), electrical work and any radiator or pipework upgrades, so you know exactly what you’re paying for.
Yes, as an MCS installer we can confirm your eligibility, apply for the BUS grant (worth up to £7,500) on your behalf and deduct it directly from your quote.
A typical air‑source heat pump installation takes around 2–5 days, and we’ll agree locations for the indoor and outdoor units, manage any planning considerations and keep you informed each day.
After the heat‑loss survey, we’ll advise if any radiators, pipework, electrics or hot‑water cylinder need upgrading so the system can run efficiently at lower flow temperatures.
Modern heat pumps are designed to be quiet and must meet UK noise regulations; we’ll position the unit to minimise any impact on you and your neighbours and comply with local planning rules.
You’ll get manufacturer warranties on the heat pump plus our workmanship guarantee, and we offer ongoing servicing and support to keep your system performing at its best.
We’ll estimate your likely annual running costs and potential savings based on your current fuel type, insulation level and tariffs, using real‑world performance data rather than lab figures.
Boiler Upgrade Scheme
Up to £7,500
off your heat pump installation
This installer handles the full BUS grant application — deducted directly from your quote. No upfront payment needed for the grant amount.
Scheme open until 2028 — limited funding available
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