Available versions besides the basic model: AP single unit with storage tank and pump. EWH (standard): Single unit mounted on powder painted galvanised steel bearing structures. Scroll compressor, brazed plate evaporator and condenser. The cooling circuit has a dehydration filter. Microprocessor regulation also controlss all the working parameters and active components in the circuit. General isolation switch with door blocking device. EWH/AP (with storage tank and pump): Fitted like the basic version, but with 1 circulation unit or centrigugal pump fitted, water storage tank, expansion tank, safety valve, flow switch.