How to Get and Compare Heat Pump Installer Quotes in NZ

Why it pays to compare heat pump quotes properly

A heat pump is one of the most common home comfort upgrades in New Zealand, but the quote can vary a lot depending on the room size, brand, electrical work, access, and how tidy the installation needs to be. A low price can look tempting in winter when demand spikes, but a quote that leaves out important work can cost more once the job starts.

The key is not just getting the cheapest quote — it’s getting the clearest one. A good comparison should help you understand:

• what equipment you are actually getting
• what labour and materials are included
• whether the installer is licensed for the work
• what could add to the price later
• which quote offers the best value, not just the lowest number

Know what kind of heat pump work you need

Before you request quotes, work out the basics of the job so installers can price it properly. In NZ, a heat pump install may be as simple as replacing an existing unit, or it may involve new electrical circuits, a new mounting location, drainage, penetrations through walls, or even an outdoor unit placement that needs careful planning.

Useful details to have ready include:

• the room or rooms you want heated and cooled
• the approximate room size in square metres
• ceiling height, insulation, and whether the room is open-plan
• whether you are replacing an existing heat pump or installing a new one
• where the indoor and outdoor units could be placed
• whether there is already a suitable power supply nearby
• any access issues, such as a steep site, second storey, or limited outdoor space
• photos of the room, switchboard area, and outside wall where possible

If you are unsure about sizing, ask the installer to recommend a capacity based on the room and your home’s heat loss. In many NZ homes, under-sizing is a bigger problem than over-sizing, especially in colder regions and older, less insulated houses.

How to request quotes so they are actually comparable

A common problem is asking different installers slightly different questions and then trying to compare very different quotes. To avoid that, give each installer the same information and ask for the same level of detail.

When requesting quotes, ask for:

• a written quote, not just a phone estimate
• the brand and model number of the heat pump
• the installed price, including GST
• what is included and excluded
• any assumptions the quote is based on
• whether the price is fixed or charge-up
• expected timeframes for ordering and installation
• warranty details for both product and workmanship

It also helps to ask the installer to confirm whether the quote includes:

• standard electrical connection work
• wall bracket or pad for the outdoor unit
• refrigerant pipework and insulation
• condensate drainage
• wall penetration and sealing
• removal and disposal of old equipment, if replacing an existing unit
• commissioning and testing

If you are collecting multiple quotes, try to get them all within the same few weeks. Heat pump pricing can shift with supplier promotions, stock availability, and the seasonal rush before winter.

What a good heat pump quote should include

A proper quote should make it easy to see exactly what you are paying for. It should not rely on vague wording such as “standard install” without explaining what standard means.

A good NZ quote will usually include:

• installer business name and contact details
• the date the quote was issued and how long it is valid for
• description of the work
• make, model, and capacity of the heat pump
• labour and material costs, or a clear fixed total price
• GST shown separately or clearly stated as included
• whether the price includes electrical work and who is doing it
• expected start and completion dates
• exclusions and provisional items
• payment terms and deposit amount, if any
• warranty information

A quote comparison checklist

Use this table to compare quotes fairly:

If one quote seems much lower, this table often shows why: a smaller unit, missing electrical work, no disposal, or fewer accessories.

Fixed price vs charge-up: what’s better?

For most homeowners, a fixed price is easier to understand and compare. It gives you a set total for an agreed scope of work, so long as nothing changes.

Fixed price

A fixed price is usually best when:

• the installer has inspected the site
• the scope is clear
• access is straightforward
• you want cost certainty

The main advantage is certainty. The downside is that the installer may build in a margin for unknowns, so fixed-price quotes can be a little higher upfront.

Charge-up

Charge-up means you pay for the actual time and materials used, often at hourly labour rates plus materials. This can be suitable for complicated or uncertain jobs, such as older homes where the electrical or wall construction is not straightforward.

Charge-up can work well when:

• the site has hidden complications
• exact routing for pipework is unknown
• the installer cannot fully inspect before starting

But it carries more price risk for you. If you accept a charge-up quote, ask for:

• hourly labour rates
• minimum call-out charges
• material mark-up, if any
• what authorisation is needed before extra costs are incurred
• a likely budget range, not just open-ended wording

In practice, many homeowners prefer a fixed price with clearly listed exclusions and a process for approving variations.

Check the installer’s credentials before you accept

A good quote is only useful if the person doing the work is properly qualified for the parts of the job that are regulated in New Zealand.

For heat pumps, electrical work must be carried out by, or under the supervision of, appropriately authorised electrical workers under the Electrical Workers Registration Board (EWRB) rules. If any plumbing, gasfitting, or drainlaying is involved, that is restricted work and must be carried out by a suitably registered person under the Plumbers, Gasfitters and Drainlayers Board (PGDB).

Also consider whether building consent may be needed. Most straightforward heat pump installations do not require building consent, but if the work involves structural changes, significant alterations, or unusual circumstances, the local council may need to be consulted. If the installer is modifying framing, creating a new external opening, or changing something structural, do not assume consent is unnecessary.

Before accepting a quote, ask:

• Are you licensed to do the electrical work?
• Will you provide the electrical compliance paperwork if required?
• Are you handling the whole job or subcontracting any part of it?
• Have you checked whether council consent is needed for this installation?
• Are you insured for public liability and workmanship issues?

If the installer seems vague about licensing or paperwork, treat that as a warning sign.

How to spot a quote that is too cheap

A very low quote is not always a bargain. It may mean the installer is cutting corners, leaving out important items, or planning to charge extras later.

Red flags to watch for include:

• no site visit or only a very brief phone estimate
• no mention of model numbers or heat pump capacity
• wording like “subject to final site conditions” without detail
• missing electrical work, drainage, or commissioning
• no GST included or unclear total price
• pressure to pay a large deposit quickly
• no written warranty terms
• no mention of compliance paperwork
• a quote that is far below other comparable quotes without a clear explanation

Sometimes a quote is cheap because it excludes the things most likely to cost extra, such as difficult pipe runs, long cable runs, scaffolding, or disposal. Ask the installer to identify any likely extras before you sign.

Ask about the details that affect performance

Price matters, but so does how the system will perform in your home. A well-installed mid-range unit can outperform a premium unit installed badly.

Important questions include:

• Is this model suitable for the room size and local climate?
• Will the indoor unit be placed where air can circulate properly?
• Is the outdoor unit positioned with enough clearance and airflow?
• How will noise be managed for neighbours and bedrooms?
• Will the installer set up the unit for efficient operation, not just basic start-up?

If you live in a colder part of the country, or in a house that loses heat quickly, make sure the installer has allowed for winter performance, not only summer cooling. In many NZ homes, a heat pump that is too small will struggle on frosty mornings and may run continuously without properly warming the space.

Compare the whole value, not just the headline price

Once you have three or more written quotes, compare them using the same criteria:

• same size and model class
• same scope of work
• same inclusions and exclusions
• same warranty length
• same payment terms
• same level of compliance and documentation

A slightly higher quote may be better value if it includes proper electrical work, longer warranty support, better access planning, and cleaner installation. Likewise, a cheaper quote may be reasonable if the scope is genuinely smaller or simpler.

If one installer is clearly more professional, ask whether they can match any genuine differences in scope rather than just discounting the price. You do not want to force everyone into the lowest price if that means losing the important parts of the job.

Before you sign: get the quote in writing and confirm the extras

Before accepting a quote, make sure you understand exactly what you are agreeing to. Ask for any changes to be written into the quote or contract before work starts.

Confirm:

• final installed price
• deposit amount and payment schedule
• what happens if hidden issues are found
• who is responsible for electrical compliance paperwork
• warranty terms and claim process
• expected completion date
• whether the installer will remove packaging and old equipment

A good heat pump installer should be happy to explain the quote and answer questions without pressuring you to sign on the spot. If the quote is clear, comparable, and backed by the right credentials, you are in a much better position to choose with confidence.