Dragon Renewables is an established heating and plumbing engineering company. Since 2003, we have focused on specifying and installing renewable energy solutions to make our residential and commercial customers more sustainable. Dragon Renewables is an established heating and plumbing engineering company. Since 2003, we have focused on specifying and installing renewable energy solutions to make our residential and commercial customers more sustainable. If you are currently using electricity, oil, coal or LPG heating then a biomass boiler or other renewable heat options are very likely to save you money on your average monthly bills. If you then include the Renewable Heat Incentive you will find your running costs on the whole heating system cheaper overall compared to most off-gas heating solutions. Based in Saffron Walden we cover an area including Cambridge, Essex and Suffolk. Proprietor Jonathan Cooke is shown on the right after the successful handover of a solar thermal heating system for the Leys School in Cambridge.