Most Kiwis know Rinnai for gas hot water and gas fires. It also sells heat pumps here through its own New Zealand company, Rinnai New Zealand Limited, based in Māngere, Auckland. That means the warranty, the spare parts and the service bookings all run through one local office rather than an outside distributor.
The heat pump range is built around one family, the Pro Series, and how long the warranty lasts depends on who installs it. Here’s what to know before you buy, and what to do once the unit is on your wall.
What Rinnai heat pumps can you buy in NZ?
Pro Series 2 high wall. The main wall unit arrived in August 2025 and comes in seven sizes: 2.5, 3.5, 5.0, 6.0, 7.0, 7.65 and 9.0 kW. It uses R32 refrigerant and has Wi-Fi built in. There’s a quiet mode that slows the fans and compressor for sleeping households and close neighbours, a refrigerant leak sensor that shuts the system down, and a Follow Me setting that reads the temperature at the remote rather than at the unit. The three-in-one filter helps it defrost faster in very cold weather.
Pro Series floor console. For rooms with low walls or big windows, with Wi-Fi, self-cleaning and a sleep mode. The outdoor unit has stainless steel bolts, a case shaped to shed water and a sealed electrical box, all aimed at coastal salt air. If you’re choosing between a console and a wall unit, floor console heat pumps covers the difference.
Pro Series 2 multi-split. One outdoor unit runs several rooms. Four indoor types (wall, slim ducted, compact cassette and floor console) and six outdoor units from 5.0 to 17.0 kW, so you can mix and match. Single-room vs multi-room heat pumps covers the trade-offs.
Pro Series 2 ducted. A central system hidden in the ceiling, run from a wall controller (CNTRLDRCINW2) or the app, with weekly scheduling. The 7 kW and 9 kW indoor units can be fitted vertically or horizontally, and the 15 kW comes in two indoor unit styles.
Is there a cold-climate model? Not as such. The Pro Series is designed to run more efficiently at lower temperatures, but the warranty doesn’t guarantee heating performance below zero. If you live where the frosts are hard, Queenstown, Tekapo or the Mackenzie Basin, ask your installer how the unit they’re quoting performs on your coldest mornings, and consider a backup heat source.
→ Related: Best heat pumps for cold NZ climates
How long is the Rinnai heat pump warranty?
Seven years parts and labour on residential Rinnai heat pumps bought from June 2025, if a Rinnai accredited installer puts it in. If a non-accredited installer fits it, the cover drops to five years. Older Q Series and earlier ranges keep their six-year warranty. The clock starts on the date the first owner bought it.
Before you sign a quote, ask whether the installer is Rinnai accredited. Two extra years of cover, same unit.
The conditions to watch:
- Service it every year. Rinnai expects an annual service by a Rinnai authorised service centre, and skipping it during the warranty period may void the warranty. Keep the invoices.
- Keep the paperwork. You’ll need proof of purchase and the install date, and the technician can ask for the electrical Certificate of Compliance your installer must give you by law.
- Some parts aren’t Rinnai’s. The warranty covers only what Rinnai supplied. Switches, cables, pipework, ducting, return air filters, grilles, zone motors and thermostats from someone else aren’t included.
- Distance costs. If you’re outside a main centre or more than 40 km from an accredited installer or service centre, travel and freight are yours.
- Owner’s jobs. Clean the filters, keep the outdoor unit clear of leaves and plants, keep the drain clear, and add corrosion protection near the sea, geothermal areas or industry.
- It stays put. A unit moved to a new spot, or fitted in a caravan, boat or portable building, isn’t covered.
Repaired or replaced parts carry the rest of the original warranty or 12 months, whichever is longer. Your Consumer Guarantees Act rights sit alongside the warranty.
→ Related: Questions to ask a heat pump installer
How do you read a Rinnai model number?
Rinnai uses three related codes. On the Pro Series 2 wall unit, the full system is HSNRTX, the indoor unit HINRTX and the outdoor unit HONRTX, so S, I and O mark system, indoor and outdoor. The number at the end is close to the size: HSNRTX25 is the 2.5 kW system and HSNRTX90 the 9.0 kW. The 7.65 kW model is the odd one out, coded 80. Check the rating plate on each unit and give the full codes when you book a service.
Can you control a Rinnai heat pump from your phone?
Pro Series units work with the NetHome Plus app, which is a third-party app, not one run by Rinnai. With it you can switch the heat pump on from outside the house, set weekly schedules, see real-time, daily and monthly energy use, and have it turn on or off as you arrive or leave. It also works with Siri, Alexa and Google Home.
Two setup tips save a lot of frustration. Your router must be on the 2.4 GHz band, not 5 GHz. And you need to finish pairing within eight minutes of powering the unit on, or you’ll have to switch it off and start again. Smart heat pumps covers what app control is good for.
What do the codes on a Rinnai display mean?
Some codes are just reminders. CL flashes after 240 hours of use to tell you to clean the filter. nF appears after 2,880 hours to say the filter needs replacing. dF means the unit is defrosting, which takes no more than ten minutes, during which the indoor fan runs slowly and no heat comes out. Reset the filter reminders by pressing the LED button on the remote four times.
Fault codes start with letters followed by numbers, such as E, P or F codes, or EH, EL, PH and PL codes. Some clear on their own. If one doesn’t, switch the unit off, turn off the power to it at the switchboard, wait a few minutes and turn it back on. If the code stays, contact your installer or Rinnai.
Before you call, remember the unit won’t restart within three minutes of being switched off. That’s a protection feature, not a fault. Heat pump problems covers other common issues.
How do I get a Rinnai heat pump serviced?
Clean the filter every two weeks. Slide it out, wash it in warm soapy water, rinse it and dry it in the shade, not in the sun. Wipe the indoor unit with a soft dry cloth, and leave any cleaning of the outdoor unit to a licensed service person. If you’re not going to use the unit for a month or more, run the clean cycle, which takes about 35 minutes and dries the inside.
For the yearly service, a repair or a warranty claim, book through the Rinnai website or call 0800 746 624. Mention any error code in the booking. If you rent, Rinnai needs the owner’s or property manager’s permission before it will take the job. Authorised service centres are listed by region, from Northland to Southland and the West Coast.
Where can I find a Rinnai installer near me?
Of the 1,020 installer websites checked in October 2026, 59 mention Rinnai. When you call around, ask each one whether they’re Rinnai accredited, because that answer decides between seven years of cover and five.
See the installers who fit Rinnai, compare the main makes in the best heat pump brands in NZ, or start from your town.