Two companies sell Mitsubishi heat pumps in New Zealand, and the Heavy Industries one is the rarer sight on installer websites. Mitsubishi Heavy Industries (MHI) brings its units in through Mitsubishi Heavy Industries Air-Conditioners Australia, which runs a New Zealand branch from Epsom in Auckland. That same company issues the warranty and nominates the technicians who do warranty repairs. Telling the two Mitsubishis apart takes about ten seconds once you know where to look. Choosing the right range and keeping the cover intact takes a bit more care.
Is Mitsubishi Heavy Industries the same as Mitsubishi Electric?
No. They share a name and not much else: separate businesses, separate products, separate distributors, separate warranties. Mitsubishi Electric is sold here through Black Diamond Technologies. MHI comes through MHIAA. A part, a remote or a warranty claim for one won’t carry over to the other. Our Mitsubishi Electric guide covers that brand.
The quickest way to tell them apart is the model number on the rating label. On the energy rating register, Mitsubishi Electric wall units start with MSZ (indoor) and MUZ (outdoor), like an MSZ-AP25. Mitsubishi Heavy Industries wall units start with SRK (indoor) and SRC (outdoor). Floor units start with SRF, and most ducted units with FD.
MHI also gives many of its wall units a second code starting DXK (indoor) and DXC (outdoor). Same box under two names: one 5 kW Ciara is registered both as SRK50ZTLA-WF and as DXK18ZTLA-WF. On the SRK code, the number is the cooling size, so 25 is 2.5 kW and 50 is 5.0 kW. The DX number doesn’t read as kW, so a DXK18 is a 5.0 kW unit, not 18 kW. When you book a service or make a claim, copy every letter of the code off the label.
Which Mitsubishi Heavy Industries heat pumps are sold in NZ?
The wall units come in four ranges:
- Ciara: the compact model, from 1.5 kW to 7.1 kW of cooling, with wi-fi built in and two quiet settings for the outdoor unit. It suits small to medium rooms.
- Avanti: 2.0 to 5.0 kW, with 3D Auto airflow, which uses three motors to spread air across the room.
- Avanti Plus: 2.0 to 6.0 kW, with a motion sensor that saves energy when no one is in the room.
- Bronte: the big-room model, at 8.0, 9.5 and 10.0 kW. On the 7.1 to 9.5 kW models, the airflow reaches up to 18 metres in cooling, which helps in a long open-plan living area.
The Wera floor unit comes in 2.5, 3.5 and 5.0 kW and can sit under a window or be semi-recessed into the wall. The floor console guide covers when one beats a wall unit. A bulkhead model is sold while stocks last.
For several rooms, the SCM multi-split runs two to five indoor units off one outdoor unit, from 4.0 to 10.0 kW. Ducted systems start with the compact FDUM (5.0 to 5.6 kW) for smaller homes, then the slimline FDU (7.1 to 14 kW), the high static FDUA (10 to 23.5 kW) and the KX range up to 28 kW. Our guides on ducted vs high-wall and single-room vs multi-room cover which layout suits which home.
→ Related: How to choose a heat pump installer
Will a Mitsubishi Heavy Industries heat pump cope with a hard frost?
There’s no separate cold-climate range. Instead, the split systems are built to run in heating down to minus 20°C outside, which covers the coldest mornings in Central Otago, the Mackenzie Country and inland Canterbury. Outdoor units have a coated circuit board and Blue Fin coating on the fins to slow corrosion and handle damp weather.
On a frosty morning any heat pump gives less than its rated output. Compare the heating stars in the cold zone of the energy label, not just the average zone, and size the unit for your coldest weeks. Our guide on what size heat pump you need explains how. For a bach that sits empty, Night Setback holds the room at about 10°C so it never gets fully cold.
→ Related: Best heat pumps for cold NZ climates
How long is the Mitsubishi Heavy Industries warranty in NZ?
Five years on parts, labour and the compressor for home heat pumps supplied by MHIAA from 1 January 2025. That covers wall units, floor units, ducted systems and single KX systems. The clock starts on the purchase date on your tax invoice, so keep it somewhere you’ll find it again. Controllers and accessories get one year on parts.
To keep the cover, the unit must be:
- installed and maintained by a licensed, qualified person, to New Zealand standards
- left at the address where it was first installed
- repaired only by a service agent MHIAA nominates.
The warranty doesn’t cover poor installation, faults from skipped maintenance such as blocked drains and dirty filters, power supply faults, travel outside metropolitan areas, or units in boats, buses and caravans. Your rights under the Consumer Guarantees Act sit alongside it.
The warranty paperwork has a page for your installer to fill in. It records the install date, their electrical licence number, the Certificate of Compliance number, their refrigerant handling licence and the model and serial number of every unit. Ask them to complete it on the day.
Can you control a Mitsubishi Heavy Industries heat pump from your phone?
Yes, through the Smart M-Air app. On the Ciara and the Bronte WF1 models, wi-fi is built in. On the Avanti, Avanti Plus and Wera, it’s a kit sold separately, so ask for it in the quote if you want it.
The app lets you change the temperature, mode and fan speed, and set a weekly timer that switches the unit up to four times a day. It can send a reminder if you’ve left the unit on, alert you when the room gets too hot or too cold, and chart your power use by month. It works with Google and Amazon smart speakers. Up to four people can have their own account on one unit. Our guide to smart heat pumps covers what an app is worth day to day.
How often does a Mitsubishi Heavy Industries heat pump need servicing?
Plan on a professional service once a year. Between visits, clean the filters every couple of months if you run the unit daily, or at the start of each season if you don’t. They wash in soap and water. Check the outdoor unit’s drain pipes for blockages too. A regas is only needed if a damaged unit is leaking refrigerant, so be wary of anyone selling one as routine. The servicing guide has the full routine.
If the unit stops working, run through the basics before you claim: filters and drains clear, fresh batteries in the remote, power reset, and nothing blocking the airflow. Then ring your installer. If a claim turns out not to be a defect, you pay the costs. To claim, use the online form at mhiheatpumps.co.nz or ring 0800 138 007, and a service agent will contact you to book a time.
Finding a local technician takes more effort than with the biggest brands. Across 1,020 NZ installer websites checked in October 2026, 22 name Mitsubishi Heavy Industries. Before you buy, check that someone near you fits and services MHI, especially in a smaller town where travel costs aren’t covered.
→ Related: Mitsubishi Heavy Industries repairs and servicing
Who fits and services Mitsubishi Heavy Industries heat pumps near you?
See the installers who fit or service Mitsubishi Heavy Industries, compare it with other makes in our heat pump brands guide, or find heat pump servicing and repairs in your town.