I had a Daikin Altherma High Temperature Air Source Heat Pump System installed by The Fuel Effect. in January 2012. It fully replaced our old oil boiler system, including hot water provision, whilst completely utilising our existing radiator system. The installation went smoothly, only 4 days on site, and was completed at a very competitive price. The weather turned very cold in early February and this system kept our house warmer than ever at considerably lower cost.