Rinnai Hot Water Heat Pump
Rinnai NZ is a major local hot water player, and its hot water heat pump range covers the integrated Enviroflo series and the newer HydraHeat range up to 340L. Strong national support and competitive supply-and-install pricing (HydraHeat 275L commonly around $8,300 installed) make Rinnai one of the most popular NZ choices.
Rinnai hot water heat pump price NZ (2026)
There are no rebates for hot water heat pumps in New Zealand, so the installed price is the whole price. Bank green home loan top-ups (about 1% p.a. at ANZ, ASB and BNZ; 0% up to $50,000 at Westpac) can spread the cost if you have a home loan. Cheapest model: Rinnai Enviroflo 265L from $6,500. Largest: Rinnai HydraHeat 340L up to $9,500.
Specifications and pricing are indicative for the NZ market as at June 2026. Confirm current models and exact pricing with your installer.
Available Models
Rinnai Enviroflo 265L
Rinnai HydraHeat 275L
Rinnai HydraHeat 340L
Specifications and pricing are indicative for the NZ market as at June 2026. Confirm current models and exact pricing with your installer.
Pros
- Large NZ installer network and local support
- HydraHeat 340L suits big households
- Competitive installed bundles
- 7-year cylinder warranty
- Easy swap from an existing Rinnai system
Cons
- Integrated units are audible (45-46dB)
- Not as efficient as CO2 split systems
- Premium models approach split-system pricing
Best for
Households wanting a well-supported mid-range option, especially larger families needing 275-340L capacity
Rinnai pricing and financing in your region
No rebates exist anywhere in NZ, but installed prices and the local gas picture vary. Each regional guide covers what actually helps, including bank green loan top-ups.
Rinnai hot water heat pump FAQ
How much is a Rinnai hot water heat pump installed in NZ (2026)?
A Rinnai hot water heat pump costs $6,500 - $9,500 fully installed in New Zealand (indicative, June 2026, GST inclusive). The cheapest model (Rinnai Enviroflo 265L, 265L) starts around $6,500; the largest (Rinnai HydraHeat 340L, 340L) tops out around $9,500. There are no rebates for hot water heat pumps in New Zealand, so the installed price is the full price. Complex installations or relocations can add to these figures, so always confirm with a written quote.
Is Rinnai a good hot water heat pump brand?
Rinnai NZ is a major local hot water player, and its hot water heat pump range covers the integrated Enviroflo series and the newer HydraHeat range up to 340L. Strong national support and competitive supply-and-install pricing (HydraHeat 275L commonly around $8,300 installed) make Rinnai one of the most popular NZ choices. Rinnai is best suited to households wanting a well-supported mid-range option, especially larger families needing 275-340l capacity.
Are there rebates for a Rinnai hot water heat pump?
No. New Zealand has no STC-style certificate scheme and no national or regional rebate for hot water heat pumps, whichever brand you buy. Warmer Kiwi Homes covers insulation and space-heating heat pumps only, not hot water. What can help with the upfront cost is bank financing: ANZ, ASB and BNZ offer green home loan top-ups at about 1% p.a. fixed for 3 years (up to $80,000), and Westpac offers 0% up to $50,000 over 5 years. You need an existing home loan and equity, and the balance reverts to standard rates after the promotional window.
What is the warranty on a Rinnai hot water heat pump?
Rinnai backs its cylinders with a 7-year warranty and the compressor with 5 years (indicative; confirm the current terms for your specific model). Workmanship cover for the install itself comes separately from your installer and should be at least 12 months. Warranty claims generally require professional installation and servicing per the manual, so keep your installation paperwork.
How efficient is a Rinnai hot water heat pump?
The Rinnai Enviroflo 265L runs at a COP of 3.7, meaning every 1 kWh of electricity in produces about 3.7 kWh of heat. Estimated annual running cost is around $325 for a 3-5 person household at average NZ electricity prices (~35c/kWh), where a standard electric hot water cylinder doing the same job typically costs three to four times as much to run.
How long does a Rinnai hot water heat pump last?
Modern hot water heat pumps last 10-15 years on average in New Zealand conditions. Cylinder life depends on water quality (replacing the sacrificial anode every few years extends it). Compressor life is the limiting factor and typically matches or exceeds the warranty period when the unit is correctly sized and serviced.
Rinnai vs other brands: which should I pick?
Rinnai sits at the mid-range end of the New Zealand market. It pairs a large NZ installer network with the biggest cylinder in the mainstream market (340L), making it the go-to for larger households. See the side-by-side comparisons below for direct head-to-head specs.
Compare with other brands
Where are you?
See indicative costs and local installers for your area