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21 Google reviews
1–2 days
Typical install time
£7,500
BUS grant amount
Heatline Renewables Ltd is an MCS certified air source installer based in Hertfordshire. They are registered with the Boiler Upgrade Scheme, meaning they can help you claim up to £7,500 towards your installation.
Based in Hertfordshire, CM21 9NR
Areas served:
5.0
21 Google reviews
Based on verified Google reviews
Maria Collins
Where do I even begin with Billy at Heatline Renewables? After a disastrous bathroom renovation, my faith in having work done at home was honestly shaken — but Billy completely restored it. Upgrading the heating system in my Grade II listed property from solid fuel to an air source heat pump was a big step, and Billy handled it with absolute professionalism and care. He brought my old house into the 21st century while respecting its character, and the standard of his work is second to none. Billy is genuinely one of the kindest, most patient and hardworking people I’ve met. Nothing was ever too much trouble, and his attention to detail is incredible — he’s a true perfectionist who takes real pride in his work. Choosing an air source heat pump has been one of the best decisions I’ve made in a long time, and I couldn’t rate Billy or Heatline Renewables more highly if I tried.
James Pa
Billy installed a Vaillant 7kW heat pump, cylinder and upgraded 5 rads (including one fan radiator). He worked tirelessly for six days in total (5 days one week and a day the following) and did a very neat and professional job, keeping 'down time' for both water and space heating to an absolute minimum. The system is much more comfortable than my previous gas boiler, and cheaper to run as well. I'm delighted this install and Billy was polite, professional and tidy throughout.
Mark Bullock
Heatline Renewables installed a heat pump for us. They were polite and made installation as easy as possible. I would recommend them if you’re thinking of having a heat pump fitted. They even installed a shower as well . They also have great customer service . We are very pleased at how warm the house is now. They are also reliable and will not let you down. Thanks Billy and Frank.
graham partington
New Boiler Installation & Commissioning Following a recent terminal failure of my existing boiler, I phoned Billy to replace the old boiler. He responded to my mobile call at the first attempt and visited to look at the job the same afternoon. After his initial inspection he was very approachable and helpful in going through the options to quickly get us back up and running. We discussed a number of new boiler options/prices and reached agreement on a new Vailant boiler. Billy rang his supplier during the visit and confirmed he could install the boiler the following week. He arrived promptly on the agreed time/day, offloaded his equipment with the new boiler and started work straight away. He removed the old equipment and made the required pipework modifications to suit the new boiler, including auto air vents (not previously fitted), to prevent possible air locks. Billy's pipework was extremely neat/tidy and to a better standard than the existing. Throughout the installation work he was friendly/helpful and did not mind discussing the details of his work. In addition to the boiler installation he completed a full system power flush and sludge removal to prevent any potential water blockages, together with all the required gas safe checks and safety checks, etc. On the cost side, I thought the price was very reasonable for the amount of work and effort put into this installation. Before leaving Billy did a thorough tidy up of the work area and removed all of the redundant equipment and parts. All in all this was a really professional job, done by an extremely competent/knowledgeable plumber, in good time. Nothing seemed to be too much trouble for Billy. I would not hesitate to call Billy for any plumbing/heating issues in the future.
Emma Carney
We called Heatline first thing on Saturday morning due to a blocked toilet when our attempts to unblock it had failed. Billy arrived within the hour and resolved it very quickly at a really reasonable price. He also identified the underlying cause (shoddy pipe work). Great service, would recommend this company.
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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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