GI Developments Ltd

• Charles Maisey

  Mar 2026

  5

  GI Development’s technical knowledge and experience is reflected in the effectiveness of the heat pump and related systems that have been installed. Flexibility and efficiency are evident in the way our heating and hot water supply can be controlled and managed. The support at handover has been excellent and we feel confident in the system and its management. We would recommend GI Developments as suppliers and installers.

  Owner's reply

  Thanks ever so much. Hope you enjoy your new home.

• Mark Taylor

  Mar 2026

  5

  Five stars in all respects, never seen so much attention to detail and artistry in design of the system. Every aspect of the conversion from gas to a heat-pump and upgrade of our hot water system was executed flawlessly. Would happily recommend Wayne and his superb team to anyone.

• Jamieson

  Mar 2026

  5

  Wayne and the team at GI Developments have been fantastic. Long story short, i had an air-source heat pump installed by a different company. Over the following 18 months it constantly had issues, but neither the original installer nor their technical suppliers would spend the time to address the issues. After months of trying other heating engineers, i came across GI Developments and Wayne. During the very first conversation it was clear that Wayne was extremely knowledgable and had confidence to address the problems. Over the course of the next few weeks, he gathered data and then used first principles to diagnose and then fix the issues. Now the system is running smoothly and efficiently. My takeaway is that there relatively few people who that the passion and capability to correctly install, diagnose and optimise heatpumps. But Wayne is one such person. Highly recommended.

• Chris Hill

  Feb 2026

  5

  Wayne and his team have just fitted my Heat Pump system. Excellent work, completed on time to the highest standards during what has been atrocious weather conditions. We now have a warm home which is already more efficient than the gas boiler that was removed. Would recommend GI Developments without hesitation for any heating needs you may require.

• Anton Welly

  Dec 2025

  5

  Wayne and his team replaced an old oil boiler for us. They take real pride in what they do and it shows in the quality of their work. Highly recommended.

• Charlie McGuire

  Dec 2025

  5

  Wayne and GI devs a deffo the best throughout Hertfordshire and beyond but loads of effort in all the time.

• Jess Jackson

  Dec 2025

  5

  Great installation and customer service from Wayne, would definitely recommend GI Developments. Jess Jackson

• Theodore Birks

  Dec 2025

  5

  Proper heating engineer. Wayne and his team replaced our gas combi boiler for a heat pump in a 4 storey Victorian terraced house. They applied the heat geek approach to make the system appropriate and efficient. It required some creative thinking and long hours. The team tried their best to keep the house tidy and liveable despite the upheaval and took away all the rubbish at the end.

• Francesca Holt

  Dec 2025

  5

  The team installed a new heat pump for us. It works perfectly. The house is warm and the water is hot. The team are very knowledgeable, and highly skilled. They conducted the work efficiently and tidily. We highly recommend their services.

• Lee Sykes

  Nov 2025

  5

  Wayne and his team have to be the best trades I've ever had working on a project. They really went above and beyond. I couldn't be happier with the quality of their work. They've restored my faith that there are people who really care about the quality of work they deliver, not just the quicker/cheapest solution. I can recommend them enough. My new installation is a work or art!

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