Designers can show compliance with New Zealand Building Code clause H1 Energy efficiency by using Acceptable Solution H1/AS1 or Verification Method H1/VM1.
H1/AS1 cites the schedule and calculation methods of NZS 4218:2009 Thermal insulation - Housing and small buildings as a solution for thermal resistance of the building envelope. H1/VM1 cites the modelling method.
This bulletin provides an overview of the calculation method. It updates and replaces Bulletin 504 NZS 4218 Calculation method.
This bulletin covers: