De Dietrich Alezio, Diematic, Split, Air Source Heat Pump. French Manufactured, High Efficiency Air Source Heat Pumps with Inverter operation. Range of sizes available for individual houses to large commercial properties. Air source heat pumps are a low cost easy installation heating system with near silent which will save up to 70% on heating bills. Houses & commercial properties. The units are compatible with BMS systems and come complete as standard with low loss header, boiler connections or 6kW electrical backup, heating pump, expansion vessel & automatic air valve. PAC_Q0109.jpg