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Regions

Heat pumps in the Auckland regionOne region, several climates.

Across the Auckland region a heat pump is mostly a heater: in the 2023 Census, 66.29% of homes used one as a main type of heating, up from 39.55% in 2018. The region isn't one climate, though. The airport barely sees an air frost, the west and the rural south get proper cold nights, and homes near a harbour face salt.

What changes from one part of the region to another

Waterfront nights against inland nights

NIWA's 1991 to 2020 normals (in Wikipedia's climate tables) give Auckland Airport a July mean low of 7.7 degrees, Henderson North 5.6 and Ardmore Airport 5.4. NIWA counts 0.1 air frosts a year at the airport against 8.8 at Henderson River Park.

Where heating works hardest

NIWA's degree-day tables give Pukekohe EWS 1,373 heating degree-days a year and Henderson River Park 1,250. NIWA says the need is lower on low-lying coastal land than inland or higher up, so a hillside home wants a heat pump sized for colder nights.

Salt along every harbour

BRANZ's summary of NZS 3604 puts land within 500 m of the coast (harbours included), 100 m of tidal estuaries and all offshore islands in exposure zone D. There, BRANZ's Level guidance wants extra anti-corrosive coatings on outdoor units.

Wind on exposed sections

NIWA says gales come most often in winter, and coastal sites are windier all year than sheltered places like Pukekohe. The top recorded gust is 204 km/h, at Manukau Heads. BRANZ says outdoor units should be stable, which counts for more on a ridge.

Damp, and homes with no heater

EHINZ found 23.4% of people in Counties Manukau and 23.1% in the Auckland health district lived in damp homes in 2023, against 20.6% nationally. The Auckland district also had the country's highest share of homes with no heating, 6.6%.

Little wood, shrinking gas

Just 7.3% of homes in the Auckland health district used a wood burner as a main heater in 2023, against 28.2% nationally. Vector's Auckland gas network had 119,991 connections at 30 June 2026, down 0.5% in a year.

Rules that apply wherever you are in the region

Connecting a heat pump is prescribed electrical work for a registered electrician, who owes you a Certificate of Compliance no later than 20 days after finishing. A wall hole for pipes and cable of up to 300 millimetres needs no building consent in an existing house (Schedule 1 of the Building Act), but exempt work must still meet the Building Code and the Auckland Unitary Plan.

Noise is where that plan bites. In residential zones, noise measured inside the neighbouring site is capped at 50dB LAeq from 7am to 10pm Monday to Saturday and 9am to 6pm on Sunday, and 40dB LAeq at other times. Rural zones such as Mixed Rural and Rural Production measure at the notional boundary instead: 55dB LAeq in those daytime hours and 45dB LAeq otherwise.

Special Character Areas, including Remuera, Parnell and Mount Eden, treat external alterations as restricted discretionary, so ask Auckland Council before an outdoor unit goes on a character house. Apartments and townhouses, 27.9% of homes in 2023, are usually unit titles: read the body corporate rules first.

Rentals must meet the healthy homes standards. Owner-occupiers can look at Warmer Kiwi Homes, EECA's programme; EECA alone decides who qualifies.

What we'd do

Our take for Auckland homes

We'd start with where the house sits. Inland or up a hill, we'd size on the 2 degree heating figure and expect defrost pauses on winter mornings. Close to the water, we'd settle corrosion protection before signing, and on an exposed section we'd ask how the outdoor unit is fixed down. Everywhere, we'd check its distance from the neighbours' bedrooms.

Cities in Auckland

Questions people ask

Do I need a bigger heat pump in west or south Auckland?
You may need one that holds its output in the cold. EECA says that where nights reach 2 degrees or colder, a heat pump's heating capacity at 2 degrees should be at least its figure at 7. Our size calculator is a good start.

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Read next

  1. 01Heat pumps in AucklandWhat Auckland's humid air, inland frosts, harbour salt and townhouses mean for your heat pump.
  2. 02Heat pump size calculatorRoom size and insulation in, a rough heating size in kW out, using BRANZ's rule of thumb.
  3. 03Do you need a consent for a heat pump?When a heat pump needs a building consent, what applies without one, and the noise limits for outdoor units.
  4. 04Home ventilation systemsWhat a home ventilation system does, the two main types, and how to tell which one suits your house.
  5. 05The healthy homes heating standardWhat the rental heating standard asks for, which heaters count, and how to check a heat pump against it.
  6. 06Warmer Kiwi Homes heat pump grantsWho EECA's programme is for, what its current heat pump list covers, and how to check before you sign.

Where this information comes from

We don't publish prices. Every home is different, so an installer's written quote is the only real number. How we write and check these pages.

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