SNZ - NZS 4218
Thermal Insulation – Housing and Small Buildings
|7 July 2009
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).