Heat pumps, sized properly. Installed by people who measure first.
We connect NZ homeowners to refrigerant-licensed installers — and we publish the sizing maths, the EECA Warmer Kiwi Homes details, and the brand trade-offs nobody else wants to spell out.
- 01Refrigerant-licensed
- 02Mitsubishi · Daikin · Panasonic · Fujitsu
- 03EECA Warmer Kiwi Homes aware
- 04Independent — no installer kickbacks
DWG-02 / Heat-pump sizing
Sizing tool. Show your working.
Most NZ heat pumps are sized by rule of thumb in the installer's head. Here's that rule of thumb, made explicit. Slide the inputs — the recommended kW updates with the maths underneath.
The heuristic: 0.13 kW per m² for a moderately-insulated NZ home with a 2.4 m stud, then adjusted for ceiling height, insulation level, and climate zone. A ±10% band is given to bracket adjacent standard unit sizes from Mitsubishi, Daikin, Panasonic and Fujitsu.
Sizing Tool
DWG-02 / Living-area heat-pump
Recommended capacity
OUTPUT-A1
Range
3.6–4.2 kW
Suggested unit type
High-wall split
A single high-wall indoor unit will heat this room comfortably — the cheapest, simplest install.
Show the assumptions ↓
Heuristic only. An installer with a wattmeter and a heat-loss calc can tune this within ~10%. Use this to sanity-check a quote — not to replace one.
The directory
A few installers worth knowing
Different regions, different specialities — heritage villas, cold-climate alpine, ducted retrofits, the lot. Browse the directory by region.
Kowhai Climate Ltd · Mt Eden
Kowhai Climate
Inner-Auckland villa specialist — multi-split and ducted in heritage homes.
14+ yrs · Refrig. licensed
- Multi-split
- Ducted
- High-wall
Mitsubishi · Daikin · Fujitsu
Tasman Heating Co Ltd · Albany
Tasman Heating Co
North Shore family-owned, ducted-first installer.
22+ yrs · Refrig. licensed
- Ducted
- Multi-split
Mitsubishi · Daikin
Horizon Cool Ltd · Manukau
Horizon Cool
South Auckland — high-volume, single-split residential specialist.
11+ yrs · Refrig. licensed
- High-wall
- Multi-split
Mitsubishi · Panasonic · LG
Harbour Thermal Ltd · Wellington Central
Harbour Thermal
Wind-aware Wellington installer — outdoor-unit positioning specialist.
13+ yrs · Refrig. licensed
- High-wall
- Multi-split
- Ducted
Mitsubishi · Daikin · Fujitsu
By region
Find an installer near you
We list installers across every NZ residential climate zone — from humid Auckland through the windy Wellington coast to the alpine Central Otago basins.
Why use this directory
Because the cheapest quote is rarely the cheapest install.
Heat pumps are 12–15 year appliances. The wrong sizing, the wrong outdoor-unit position, or the wrong installer turns a $4,000 unit into a $4,000 unit you replace early. We point at people who don't do that.
01
Refrigerant-licensed installers only
Every installer on our directory holds a current NZ refrigerant handling licence. We don't refer the unlicensed handyman installs that leak, void warranties, and need ripping out within 18 months.
02
Correct kW sizing, not the biggest unit that fits
Undersized heat pumps run flat-out and never reach setpoint; oversized ones short-cycle and dehumidify the air dry. Our installers measure rooms before quoting — and we give you the maths so you can sanity-check.
03
Brand-agnostic — Mitsubishi, Daikin, Panasonic, Fujitsu
Whichever brand actually suits your space, your noise tolerance and your budget. Not whichever one has a supplier kickback for the installer that month.
04
Warmer Kiwi Homes literate
If your household is eligible for EECA's Warmer Kiwi Homes grant we tell you — most heat-pump quotes ignore the up-to-80%-funded ceiling/underfloor insulation that should usually go in first.
Guides
Reading before you buy
Plain-English NZ writing on the parts of the heat pump decision that most installers wave away. No affiliate-revenue gloss, no brand favouritism.
Guide · 6 min · 26 April 2026
How to size a heat pump for a NZ living room
The maths an installer should be doing — kW per square metre, ceiling height, insulation level, and the climate-zone uplift. Sanity-check any quote in five minutes.
Read article →
Guide · 6 min · 26 April 2026
Warmer Kiwi Homes — what's actually covered
EECA's residential subsidy scheme, plainly explained. Eligibility, the 80% (and sometimes 100%) ceiling/underfloor insulation funding, the heater grant, and the things that aren't covered.
Read article →
Guide · 5 min · 26 April 2026
Ducted vs high-wall — which for your villa?
The trade-offs nobody quite spells out. Cost, aesthetics, retrofit complexity, zoning, and the surprisingly small efficiency difference.
Read article →
Enquire directly
Skip the phone-tree, get installer quotes.
One form. Two to three quotes from refrigerant-licensed installers in your region. We pre-filter against the basics — sizing approach, brand range, and after-sales record — so the quotes that come back are worth comparing.
- Takes under 60 seconds — we don't grill you on details.
- We only forward to installers in your region — no Auckland quote arriving for a Dunedin job.
- You pick which installer to talk to. Or none — there's no obligation either way.
Request installer quotes
FORM-Q1
Tell us about your place. We'll match you with 2–3 vetted installers in your region within 48 hours.