A heat pump hot water system in NZ costs $3,500–$6,500 fully installed. The unit itself is $2,000–$4,000 with installation adding $800–$1,500. EECA rebates can reduce out-of-pocket costs by $500–$1,000 or more.
Heat pump water heaters use refrigerant technology to extract heat from the air and transfer it to your water — 3–4x more efficient than standard electric cylinders. The technology costs more to manufacture and install, but popular NZ brands include Rheem, Stiebel Eltron, and Midea.
As of 2026, EECA's Warmer Kiwi Homes programme offers up to $1,000 rebate for eligible households switching to heat pump hot water. Canterbury Regional Council (ECan) and some power companies offer additional incentives. Check EECA's website for current eligibility.
In Canterbury, a heat pump cylinder can save $400–$700 per year compared to a standard electric cylinder for a family of four. At that rate, the system pays for itself in 5–8 years and typically lasts 15+ years.