We have moved into a property with an Ecodan air source heating system (some underfloor heating and some radiators). I have set it to run 24hrs as it is winter. We also have a gas aga with aims but this is for cooking only. Mostly the house is warm house, but there are areas that are not so warm, such as the downstairs shower room that only has a heated towel rail, and the extension that has under floor heating. I need someone to guide me with this, I also need someone who knows what they are doing to service the system as it is 2 years old. Mitsubishi is too expensive.