Chasewater, Cornwall boiler replacement with Mitsubishi Ecodan air source heat pump Published June 18, 2013 at 2048 × 1536 in Boiler replacement with a Mitsubishi air source heat pump, Cornwall← PreviousNext → A Mitsubishi Ecodan air source heat pump was installed at this property in Cornwall to replace our clients existing boiler. See our more detailed case study.