Our Calculation Process

Knowing what to assess and understanding how to do that is important when compliance is essential

"H1 Assessments are complex calculations and require several key elements.....
             - experienced people
             - knowledge and currency of the rules
             - recency and competency with the assessment
             - a capable tool that ensures compliance"

How do we do it

We have 4 preparatory steps that we use in the planning phase of our assessments;

     1.  Thermal Envelope assessment 
     2.  Plan measurement & take off
     3.  Construction type definition
     4.  Orientation & placement

We then complete the H1 assessment using our proprietary tool which has all Acceptable Solution (AS1) Building Code parameters (NZS 4218) imbedded;

     1.  Data insertion
     2.  Approved Method assessment
     3.  Required Method calculation process

Schedule Method

      1.  Correct Schedule Table (Construction Type & Climate Zone)
      2.  All R-Values checked
      3.  Heated Components checked
      4.  E3 Requirements checked
      5.  Compliance verified
      6.  H1 Assessment Report produced

Calculation Method

      1.  Reference Building Calculations (30% & 70% rule)
      2.  Heat Loss assessment (Proposed & Reference building)
      3.  Calculation Method compliance check (60% R-Value rule)
      4.  Heated Components checked
      5.  E3 Requirements checked
      6.  Compliance verified
      7.  H1 Assessment Report produced

Model Method

A full calculation modelling approach is undertaken in accordance with the Verification Methods required by NZS 4218