Description

This tool calculates heat loss for the calculation method of NZS 4218:2009. It is not a replacement for NZS 4218:2009, and designers are advised to obtain a copy from Standards New Zealand.

Designers need to select the climate zone and wall construction type(s) and accurately enter all area and construction R-values for the various building elements. The tool then applies the calculation method automatically, and pass/fail compliance is determined.

Note: NZS 4218:2009 is not currently an Acceptable Solution under clause H1 of the NZBC. The current cited Standard for clause H1 is NZS 4218:2004. However, this H1 Calculation Method Tool may be used as an Alternative Solution.

Scope

The H1 Calculation Method Tool may be used as an Alternative Solution.

Only the following designs are eligible to use this tool to demonstrate compliance with NZBC clause H1:

• Housing (all types, any size);
• Buildings other than housing with a net lettable area of no more than 300 m; and
• Buildings other than housing with a net lettable area of greater than 300 m may use this tool.

However, NZS 4243 is usually used. This tool is not the calculation method of NZS 4243 and must not be used for this purpose.

This tool is not the calculation method of NZS 4218:2004 or H1/AS1 and must not be used for this purpose. Refer to New Zealand Building Code clause H1 Energy efficiency Third Edition for full details.