Heat pump hot water efficiency standards face major overhaul as EECA reviews minimum energy performance requirements
EECA’s comprehensive review of heat pump hot water efficiency standards could raise minimum performance thresholds by 15-20%, potentially removing lower-performing models from the NZ market by early 2027.
How to comply
It is a legal requirement for suppliers to register all heat pump hot water systems under the Energy Efficiency (Energy Using Products) Regulations 2002 before sale in New Zealand. Compliance testing must demonstrate adherence to both current and proposed minimum energy performance standards.
Proposed efficiency changes
Standards under review
The proposed amendments target AS/NZS 4234 testing protocols and introduce stricter coefficient of performance (COP) requirements. Standards documentation can be purchased from Standards New Zealand for detailed technical specifications.
Which products are affected
The review encompasses all residential and light commercial heat pump hot water systems with storage capacities between 160-400 litres. Heat pump hot water cylinders currently meeting minimum thresholds may require efficiency upgrades to remain compliant.
Performance thresholds
New minimum COP requirements could rise from 3.2 to 3.8 for temperate climate zones, with additional seasonal performance factors under consideration. According to EECA, the changes aim to align New Zealand with international best practice standards.
NZ Building Code implications
Building Code Clause G12 water supplies may require updated compliance pathways to accommodate enhanced efficiency requirements. Territorial authorities will need guidance on assessment criteria for building consent applications.
Market impact analysis
Industry estimates suggest 30-40% of current models may fail to meet proposed standards, potentially affecting supply chains and pricing structures. Consumer choice could narrow initially before manufacturers adapt product lines.
Implementation timeline
EECA consultation closes June 2026, with final regulations expected by October 2026. A 12-month transition period would allow existing stock clearance before mandatory compliance from January 2028.
Registration requirements
Suppliers must update product registrations to reflect new performance data and compliance certificates. Non-compliant products face removal from the Energy Rating Label database and prohibition from sale.