A central heating system heats more than one dwelling (generally all dwellings). In multi-dwelling developments, BASIX recognises the following types of central heating systems.
Fan coil and heated water
Dwelling heating unit(s) contain fan and heating coil (typically integrated with cooling fan coil unit); medium temperature (typically 60-80oC) heating water is piped from central heating plant)
Fan coil and electric resistance
Heating provided by electric resistance elements located in the dwelling cooling unit or ductwork
Radiators and heated water
Dwelling heating provided by radiators; medium temperature (typically 60-80oC) heating water that is piped from central heating plant
Water source packaged units and heated water
Dwelling air conditioning unit(s) contain fan, cooling coil and compressor; heat is extracted from low temperature (typically 20-30oC) water piped from central heating plant
Water source packaged units and electric resistance
Heating provided by electric resistance elements located in the dwelling cooling unit or ductwork
Variable refrigerant volume units
Dwelling air conditioning unit(s) contain fan and heating coils; hot refrigerant gas is piped from central compressors and heat source plant.