Heat Pump Installation Cost in Whanganui

  • 13installers in Whanganui
  • Updated 29 Oct 2026

A heat pump quote in Whanganui comes down to the size of the unit, the run between the indoor and outdoor units, and what the installer finds on the day. The price table lists typical installed prices for a standard back-to-back install, drawn from published price guides.

Homeowners want to know which unit suits which room, what a quote should cover, and whether help with the bill exists. Whanganui has a mix of electricians and plumbers who fit heat pumps, and what they publish about their own work is a fair guide to who does what.

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Typical NZ installed prices

Heat pumpTypical installed price
Small high-wall, about 2.5 kW (bedroom, small room)$2,000 to $3,200
Medium high-wall, about 5 kW (lounge)$2,800 to $4,800
Large high-wall, about 8 kW (open-plan living)$3,500 to $5,500
Ducted, whole house$12,000 to $22,000

Installed prices, including GST, for a standard back-to-back install. Based on published price guides from eight NZ installers and retailers, updated Oct 2026. What changes the price

What size heat pump do you need in Whanganui?

Enter the room size and how well it holds heat for a rough size. An installer confirms it when they measure up.

About 5 kW

A rule of thumb NZ installers use, for a room with a standard 2.4 m ceiling. High ceilings, big windows and open-plan spaces need more, so an installer should confirm it.

How to size a heat pump

How much does a heat pump installation cost in Whanganui?

In a typical home, the small high wall unit in the price table, about 2.5 kW, suits a bedroom. The medium, about 5 kW, suits a lounge. The large, about 8 kW, suits an open plan living area, and a ducted system covers the whole house.

A standard back-to-back install puts the indoor unit on an exterior wall with the outdoor unit mounted directly behind it, so the pipe run stays short. That is the job the price table describes.

The guide to ducted and high wall heat pumps sets out the difference, and the guide to what size heat pump you need walks through sizing a room.

What pushes a Whanganui heat pump quote up or down?

Frosts can occur anywhere in New Zealand, and inland and southern towns see colder winters, so ask how a unit performs on a cold morning before you sign.

Quotes for the same room can land far apart once the installer has seen the job. The common reasons:

How do Whanganui heat pump installers compare?

Of the town's installers, 11 say they fit heat pumps and 3 say they install ducted systems. None mention multi-room setups on their websites, so ask directly if you want several rooms covered. Six mention free quotes, 5 mention servicing and 4 mention repairs. One says it is an authorised dealer for a brand, and hot water comes up too, which fits the plumbers in town who fit cylinders.

Most of the firms keep to the city and its rural surrounds, and few name an outside town. Palmerston North is the one named most. The guide to single room and multi-room heat pumps covers planning a multi-room job, and the heat pump servicing guide explains what a service visit includes.

Can I get help paying for a heat pump in Whanganui?

None of the town's installers mention finance on their websites, so raise payment early if you want to spread the cost. None mention Warmer Kiwi Homes either.

That scheme is run by EECA and funds heat pumps for eligible owner occupiers. Eligibility depends on holding a Community Services Card or a SuperGold Combo Card, or on living in a qualifying area. The heat pump grants guide sets out how it works.

For a wider view of what homeowners pay elsewhere, the national heat pump cost guide covers the country.

Compare every installer on the Whanganui page.

Heat pump cost questions in Whanganui

How do I compare two heat pump quotes?

Ask for the energy label and compare like with like. It shows heating output at 7°C and at 2°C outside, and cooling at 35°C. Put the units on the same figures and you can see which one holds its output on a cold morning.

Should I check the warranty before I book?

Seven of the town's installers mention a warranty on their websites. Ask what it covers, who handles a claim, and whether the installer or the manufacturer is the one to call. Get the answer written into the quote before you accept it.

What is a floor console heat pump?

A floor console unit sits low on a wall rather than high up. Two of the town's installers say they fit them, so ask whether one suits your room. They can work where a high wall unit has nowhere sensible to go.

What if the final bill is higher than the quote?

Under the Fair Trading Act, a quote must not mislead, and that includes hidden costs. If you did not agree a set price, the Consumer Guarantees Act means you pay only a reasonable price. Ask for any extra work to be confirmed before it starts.