Product features ESEER up to 5.01 High seasonal efficiency All models are PED pressure vessel approved Inverter stepless single-screw compressor Optimised for use with R-134a 2 truly independent refrigerant circuits DX shell and tube evaporator – one pass refrigerant side to minimize pressure drops Achieving building comfort conditions much faster at start-up Standard electronic expansion valve Partial and total heat recovery option available Power factor over 0.95 Standard operation range down to -12°C