An H1 Energy Efficiency Assessment is a compliance requirement under Clause H1 Energy Efficiency of the New Zealand Building Code, which sets minimum performance requirements for reducing energy use and improving building thermal performance. Compliance must be demonstrated as part of the Building Consent process for most building work involving habitable or conditioned spaces.
Dewick & Associates’ in-house Chartered Engineering Team provide specialist H1 compliance assessments that ensure proposed building designs meet the required standards for insulation, glazing, building fabric and, where applicable, building services efficiency prior to submission to the Building Consent Authority (BCA).
An H1 assessment evaluates a building’s thermal and operational energy performance, with a primary focus on the building envelope. Considerations include key design factors such as fabric efficiency (walls, roofs, floors, glazing), insulation levels, thermal bridging, solar heat gain, shading strategies, air tightness, HVAC system efficiency, lighting performance and controls. The assessment ensures that the building achieves a level of performance consistent with the intent of Clause H1.
Compliance with Clause H1 may be demonstrated using one or more of the following methods:
The appropriate method is selected based on project complexity, building type, and design objectives.
The outcome of the assessment is a detailed, technical H1 compliance report suitable for submission to the Building Consent Authority, confirming whether the proposed design meets Clause H1 requirements.
H1 Energy Efficiency Assessments are undertaken in accordance with:
All documentation is prepared to support formal consent approval and integration into wider project documentation. Dewick & Associates ensure energy efficiency compliance is achieved without compromising design flexibility, buildability, or cost.
Services: Mech, Elec, Fire, Hyd, MEP
Format: Digital, online, D&A standard, QR code, client specific
Drafting: As Installed / As Built Drawings
Heat Loads, Ventilation Assessment
Air side / water side static calculations
Equipment sizing / schedules
Chartered / Registerd Engineers
Content: Architectural and Structural
nucleus, Digital Handover Platform
Collation of certificates and content
Format: Digital, D&A Standard, PDF
Detailing key building performance information
Authored: by Chartered Engineers
Reference to other documentation.
Services: Mechanical, Electrical, MEP Includes processes and procedures
Inspection Test Plans (ITP)
Building Tuning Plans
