scope:

This Standard specifies thermal insulation requirements for housing and small buildings.

For buildings other than housing where two or more buildings are joined to form a larger building (greater than 300 m2), the joined building may be treated as a large building. For further guidance refer to NZS 4243.1 Energy efficiency - Large buildings - Building thermal envelope.

This Standard provides three methods of demonstrating compliance:

Schedule method Select from the set of minimum construction R-values requirements (see 4.1).

Calculation method Use a calculation to compare the proposed building with the reference building and ensure that the proposed building has no more heat loss than the reference building (see 4.2).

Modelling method Use a modelling technique to compare the proposed building with the reference building and ensure that the proposed building consumes no more energy than the reference building (see 4.3).