Why this site exists
Every heat pump site in New Zealand does one of two things: it publishes a price range and asks you to book a free assessment, or it takes your details and sells them to three installers who then ring you. Neither tells you what your room needs or what it will cost. The information to work both out is public, so we published it: a sizing method with the arithmetic shown, sourced market prices, and a line-by-line definition of what a standard install includes.
Then we went a step further and made it something you can buy. One price for a size, a refundable deposit, and one company on the hook if it goes wrong.
How we size a room
Floor area × 0.13 kW per m², plus 12% for every 0.3 m of stud above 2.4 m, plus 35% with no insulation or minus 15% with wall insulation and double glazing, plus 20% in Building Code H1 climate zones 5 and 6. It is a rule of thumb, not an official standard, and we say so on the calculator where you can see the working. The climate zones come from MBIE's H1/AS1, and the winter temperatures from NIWA's 1991–2020 climate normals. The installer's site check confirms the size before you accept a price. Landlords meeting the Healthy Homes heating standard must use Tenancy Services' official Heating Assessment Tool instead; we link to it rather than competing with it.
How we choose installers
Before an installer does a job for us, we check their registration on the Electrical Workers Registration Board's public register, keep evidence of their refrigerant handling certification and their public liability insurance, and sign a subcontract that sets the rate, the site-check turnaround and the workmanship warranty. Their name and credentials appear on this site only once that is done. Until then, no page here names an installer, because inventing one would be lying to you.
How we make money
We sell the whole job at the package price and pay the installer their agreed rate. The difference is our margin. It covers the sizing, the booking, the site-check coordination, the warranty admin and carrying the seller's obligations under the Consumer Guarantees Act. We are not paid by any heat pump brand, and the brand pages are not sponsored. If we can't reach your area and you ask us to, we may pass your details to an installer who can and receive a referral fee for it — you are told who first, and it only happens if you tick the box.
What isn't true yet
We would rather show you an empty space than a made-up one. There are no reviews on this site because we have no customers yet. There are no job counts, no years-in-business, no "trusted by" badges and no installer photos. Our fixed prices are not published because they are set from two installer quotes per size and those quotes are not in. Every region is a waitlist. When each of those changes, the page changes with it.
Who runs it
NZ Heat Pumpsis a small New Zealand business, not a call centre and not a franchise. The same people who size your room write the quote, book the installer and answer your email. Nobody here is an electrician or a refrigerant technician, and we don't pretend otherwise: a registered installer does that work. Our job is making sure the number you were quoted is the number you pay.
Corrections
Every figure on this site carries a source and the date it was checked (currently 15 September 2026). If something here is out of date or wrong, tell us and we will fix it and say when: contact us.