Heat Pump Installation Cost in Invercargill

15installers in Invercargill

Updated 29 Oct 2026

Replacing an old heater with a heat pump is a big job, and the quote depends far more on your walls and access than on the badge on the unit. A bedroom unit and a whole-house ducted system are different projects.

The price table gives typical New Zealand installed prices, including GST, for a standard back-to-back job, drawn from the published price guides of eight installers and retailers. It is a fair place to start on a budget.

Typical NZ installed prices

Heat pump	Typical 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

Heat pump

Typical 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 Invercargill?

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

Room size (m²)Insulation

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.

What does a heat pump cost to install in Invercargill?

A standard back-to-back install is the simplest job to quote. The indoor unit goes on a wall inside, the outdoor unit sits on the other side of that same wall, and the pipe run between them is short. The unit, pipework, labour and electrical connection are all in.

Match the unit to the room. A small high wall of about 2.5 kW suits a bedroom, a medium unit of about 5 kW suits a lounge, a large unit of about 8 kW suits open-plan living, and ducted covers the whole house. Read heat pump sizing before you settle on a model.

Read the energy label, not the headline figure. It shows heating at 7°C and 2°C outside, and cooling at 35°C, so compare quotes on the same numbers. Frosts can occur anywhere in New Zealand, and inland and southern towns see colder winters.

What pushes a heat pump quote up or down?

Two installs of the same unit can land at different ends of a range, and the difference is nearly always the job rather than the hardware. A short pipe run, easy access and a plain wall keep a quote lean.

Ask for the extras to be itemised, so two quotes that sound alike can be compared once the pipe runs and electrical work are spelled out.

A longer pipe run between the indoor and outdoor units
Awkward access or height for the outdoor unit
A wall that needs a bracket, or a floor-level pad
Extra electrical work, such as a new circuit or a switchboard upgrade
Removing an old unit
A larger unit, or a ducted system rather than a single split

How do Invercargill's installers compare?

Fifteen heat pump installers are listed for the city, and plenty of them come to the trade through refrigeration, farming or electrical work rather than heating alone. Eight say they give free quotes, which is the simplest way to test a firm before you commit.

Four say they fit ducted systems and 3 mention multi-room setups. Weigh ducted and high wall heat pumps and single and multi-room systems before you choose.

Aftercare is covered. Twelve say they service heat pumps and 6 mention repairs, and the heat pump servicing guide explains what a visit involves.

Winton is the nearest place listed alongside the city, and no nearby town offers a bigger field, so the choice sits in Invercargill. If you live outside the city, say so when you ask for a quote.

Ways to pay for a heat pump in Invercargill

One of the town's installers mentions finance, so payment plans are not the default. If spreading the cost matters, ask each firm directly and compare the terms in writing.

One installer mentions Warmer Kiwi Homes. The EECA scheme funds heat pumps for eligible owner-occupiers, and 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 the criteria.

A quote must not mislead under the Fair Trading Act, hidden costs included. Where no price is fixed in advance, the Consumer Guarantees Act means you pay only a reasonable price.

Compare every installer on the Invercargill page.

Heat pump cost questions in Invercargill

Who does the electrical work on a heat pump install?

A new circuit or a switchboard upgrade is often part of the job, and that work has to be done by a licensed electrician. Four of Invercargill's installers say a registered electrician is part of the team. Check who can install a heat pump before you book.

What if the room has no free wall for a high wall unit?

Two of the town's installers say they fit high wall units and 3 list floor consoles. A floor console sits low and can go under a window where the wall is taken up by glass or a shelf, which suits a room with little free space.

Does an authorised dealer badge help with warranty?

Two of the town's installers say they are authorised dealers for a manufacturer, and 5 mention a warranty on their websites. Ask what the manufacturer's warranty covers, what the installer guarantees on the workmanship, and who handles a claim if a fault appears.

Can a heat pump heat my hot water as well?

Four of the town's installers list heat pump hot water alongside room units. That is a separate cylinder that heats water for taps and showers, quoted as its own job rather than folded into a room install, so ask for it to be priced on its own.