BRANZ Calculation Method Tool v8 Basic (September 2024)

The webinar covers:

• What the H1 Calculation method is and when to use it
• Reference houses and how these are calculated
• The advantages, disadvantages and limitations of the calculation method
• Tricks + tips how to make it useful
• How to use and verify the output.

• Please note: that access to this webstream will expire after 1 month.

This Microsoft Excel (.xlxs) 25MB download of BRANZ House Insulation Guide 6th edition is for PC users.

Updates:

• A new 'Summary' sheet has been added to the tool
• An error has been repaired where the R-value for plain slab floors was higher than it should have been when adding floor topper insulation
• Improvements to the 'Correction for reduced perimeter insulation' section of the 'Roof spaces' sheet

The guide is now in two parts:

• The tables of construction R-values for common construction options for compliance under H1/AS1 and H1/VM1 5th edition
• The accompanying House Insulation Guide text [PDF] for guidance on insulation to meet or exceed H1 AS/1 and H1/VM1 5th edition.

In this free 20-minute module, you’ll learn about some of the key challenges to achieving or exceeding the new performance requirements to comply with H1 Energy efficiency. The focus is on H1/AS1 and H1/VM1 5th edition amendment 1.

Topics include:

• What are construction R-values?
• Roofs – sloping and skillion
• Floors – underslab heating and slabs with attached unconditioned spaces
• Windows – compliance and avoid overheating
• Doors – compliance and opaque doors
• Walls – compliance and improved performance
• Secondary insulation – improve performance for walls and roofs