1.1.1
This Standard applies to domestic type hot water systems that supply sanitary appliances and sanitary fixtures. It sets out minimum energy efficiency requirements in terms of heat losses from domestic type hot water systems.
1.1.2
This Standard is applicable to all domestic type hot water systems irrespective of the energy source. Domestic type hot water systems are those which:
(a) Supply hot water to sanitary appliances and sanitary fixtures. This includes water used for domestic type uses such as personal washing, showering, bathing, utensil washing and clothes washing regardless of the classified use of the building (e.g. commercial or industrial).
(b) Have a storage capacity, for individual water heaters up to 700 litres, or have instantaneous water heaters.
1.1.3
This Standard does not include:
(a) Electric storage water heaters installed in non-domestic situations and with an energy input rating greater then 10 kW;
(b) Gas storage water heaters installed in non-domestic situations and with an energy input rating greater than 45 MJ/h;
(c) Industrial or commercial applications with the same usage stated in 1.1.2(a), e.g. commercial washing machines in commercial laundries.
NZS 4305:1996 history
1996NZS 4305:1996 Energy Efficiency - Domestic Type; Hot Water Systems