Registered Retailers and Installers Only retailers and organisations registered with the Clean Heat Project are able to undertake any installation work for the Clean Heat Project. Ceiling Insulation Underfloor Insulation Diesel Gas Heat Pump Night Store Pellet Solid Fuel Removal of Fireplaces Any work undertaken by any person or organisation who is not registered will not be rebated. Any Organisations that are not registered and would like to do so, please contact the Project Manager.