Cosier Heat Ltd

• Gemma Harris

  Jun 2026

  5

  Helpful, friendly & efficient

• Stephanie Le L

  May 2026

  5

  We had a fantastic experience with Cosier, they were such a delight to have around whilst doing the installation, were patient in explaining what was going on, considerate and tidy, and went above and beyond to ensure everything was working correctly. Fantastic service - thank you

  Owner's reply

  Thanks so much, Steph. Thanks for trusting us to work in your home, and thanks for your patience, tea and home-made biscuits! As always, you know where to reach us if you have any issues at all, and we'll be back in touch when the weather gets cooler to make sure your heat pump is optimised.

• Diana Mistry

  Mar 2026

  5

  I'm very happy with the heat pump service from Cosier. A different company installed my heat pump but I'd had a nightmare trying to get them to come back to do a service. In contrast, it was easy to book a time with Cosier, and the engineer Mark turned up on time and thoroughly cleaned the outdoor heatpump. He showed me how the fins behind the fan had become dirty over time and that the heat pump would be working less efficiently as a result. Mark used some cleaning fluid to clean the heat pump itself and showed me the dirt that was starting to build up in the magnetic filter. After cleaning everything, he spent extra time going through the settings that my original installer had set. He noticed that the hot water had been set to run 24 hours (which was expensive), and set up a schedule so that it would only do the hot water heating in the night time when I get the cheapest rate on my EV tariff. He also set up "weather compensation" and explained how this would allow the heat pump to run low-and-slow instead of on-and-off at the fixed temperature set by the original installer. I got the feeling that my original installer had just left the controls on default factory settings instead of trying to optimise it to give me the lowest running cost. I'll be using them every year from now on.

• Shailesh Varsani

  Jan 2026

  5

  I can’t recommend Cosier highly enough. From start to finish, the service was outstanding. Ben and Mark did a wonderful job at my property. They were thorough, attentive, and worked seamlessly with the rest of the building team throughout the project. They suggested excellent, well thought out solutions during the installation and took great care to ensure everything was fitted neatly and discreetly. I opted for the Sunamp heating system, and I’ve been genuinely amazed at how well it works. In fact, you genuinely cannot tell that there is a heat pump installed in my property at all. Communication was excellent throughout. Ben and Mark kept me up to date at every stage and carried out a very thorough handover, making sure I fully understood how the system worked and how to operate it confidently. Before choosing Cosier, I rang around several other heat pump providers, but Cosier’s level of service, care, and attention to detail really suited my build and they were also very competitively priced. The system works fantastically and performs exactly as they outlined during the planning stage. Since the installation was completed, several other heat pump engineers have visited the property, and every single one has commented that the installation is a "piece of art". Thank you, Ben and Mark, it has truly been a pleasure to have you working at my property and to see such a beautifully designed and flawlessly operating heat pump system brought to life.

  Owner's reply

  Thank you so much for your review, Shailesh. We really enjoyed working with you from seeing the initial architect's plans in your pre-renovation house, through to seeing the finished product. It's been a pleasure working with you and your building team. Best of luck for the move back into the house, and please don't hesitate to call myself or Mark at any time, particularly if you have any questions while you're getting used to living with a heat pump.

Reviews pulled from Google Maps. We display them as posted by Google users.