Heat pump installation in Palmerston North
Your installer will size it for the frosts that settle in this valley rather than an average winter, and put the outdoor unit where the westerly isn't driving into it, so it's still heating on the mornings that test it.
What it costs
These are fitted prices, covering the unit, the indoor and outdoor mounts, the pipework, the drainage and the electrical work. What lifts one quote above another is the capacity the room needs, how far the pipework travels, and whether it's a two-storey or awkward-access job.
| Type | Supplied & fitted | Suits |
|---|---|---|
| High-wall bedroom or small room | $2,500 to $3,500 | Around 2.5kW, and the quickest job on the list. |
| High-wall main living area | $3,200 to $4,500 | A 5 to 6kW unit, and what most Palmerston North houses actually book. |
| High-wall large or open-plan | $4,500 to $6,500 | A 7 to 8kW unit for a big lounge or a knocked-through living and dining. |
| Multi-split two rooms or more | Quoted per head | Several indoor heads off one outdoor unit. On a windy section it also leaves you one outdoor position to get right instead of three. |
| Ducted whole home | $12,000 to $25,000+ | Vents in every ceiling and nothing on the walls. Needs the roof space for the ductwork. |
You'll get a firm price once your installer has the right measurements and details of your job. Costs can vary a lot, and the cost page goes into why.
What’s included in the price
Supply and install is handled as one job, so there's no chasing a separate supplier and sparky.
- The heat pump, sized for the house rather than the floor plan
- Indoor and outdoor mounts, and a level base for the outdoor unit
- Insulated pipework and drainage that clears properly
- Electrical connection and certification
- Commissioning and a walk through the controls
- A tidy-up before they leave
- Manufacturer warranty on the unit
- Removal of the old unit if there is one
How a heat pump installation works
Most single high-wall installs take about half a day.
Free quote
Tell us the rooms, your suburb and whether the windows are single glazed. That last one changes the size more than the floor area does in an older house.
Site visit
Your installer measures the room, then walks the outside of the house. Which wall the outdoor unit ends up on matters here, and it's easier to settle standing there than over the phone.
The install
The indoor head goes up where the air can move through the room rather than straight into a corner, the outdoor unit is set level, and the pipework and drain go in. The wall penetration gets sealed properly and the lines are vacuumed and tested before the system is charged.
Commissioning
Someone runs you through the controller before they leave, including the dry mode, which earns its keep through a damp Manawatū winter.
Which type of heat pump suits your home
A single-glazed villa with a high stud through Terrace End behaves nothing like a flat-ceilinged open-plan build at Kelvin Grove, even at the same floor area, so how old your house is matters more here than what you spend.
High-wall
Mounted high on the wall, blowing warm air down and across. The workhorse, the cheapest to fit, and fine through a Manawatū winter as long as it's sized right.
Floor console
Sits low on the wall like a radiator, pushing heat out at floor level where the cold air sits. That's why it earns its keep in the older villas around West End.
Ceiling cassette
Recessed into a flat ceiling, blowing four ways. Spreads heat evenly across a big open-plan room without a bulky box on the wall.
Multi-split
Several indoor heads sharing one outdoor unit, so a few separate rooms get heated from a single spot outside.
Ducted
Hidden in the ceiling, feeding every room through vents. Evenest heat and the dearest to fit, and it wants the roof space for ductwork.
What size heat pump do you need
The size is where cheap installs come unstuck, and in this city two features of the housing push the figure up more often than not.
Bedroom or small room
About 2.5kW.
Living area
5 to 6kW.
Large or open-plan
7 to 8kW.
Step up from there for single glazing, a high stud, or a house that has never been insulated properly.
The basin collects the cold
Palmerston North sits in a valley basin, so on a still night cold air drains off the ranges and pools here rather than moving on. A heat pump pulls its warmth out of the air outside, and the colder that air is the less warmth there is in it to pull, which means output falls away on exactly the mornings you need it most. Size a unit off a mild day and it'll be flat out at 7am in July and still behind.
Then single glazing adds to it
A single pane sheds heat roughly ten times faster than the wall around it. In a villa through Terrace End or Hokowhitu with a wall of original windows, the room is losing warmth on a frosty night about as fast as a modest unit can put it back, so the capacity has to cover the loss rather than just the volume.
Bigger isn't automatically the answer. An oversized unit short-cycles, reaching temperature in a rush and stopping before it has taken any moisture out of the air, which in a damp winter leaves the room warm and still clammy. An undersized one never gets there at all and costs more running to fail.
Put your rooms through the sizing calculator for a starting figure, then have whoever quotes it measure the place properly.
Replacing an old heat pump
A second heat pump here is usually one of two things. The unit is old enough that parts have got scarce and efficiency has moved on, or it was never the right size for the room and has spent every winter since running flat out and still leaving the far corner cold. The second one isn't fixed by a newer model of the same capacity, so it's worth saying out loud when you ask for a quote.
A replacement often reuses what's already there. Mounts, pipework and cable that are the right size and in sound condition can stay, which takes a real chunk off the price. Pipework carrying the residue of an older refrigerant can't, because leaving it in shortens the life of the new system.
It's also the moment to move the outdoor unit if the old one ended up facing straight into the westerly. Shifting it round the house while the job is already open costs a fraction of a separate visit, and saves you a winter of defrost cycles every year after.
Worth knowing up front: if the old unit never really coped, say so before anyone quotes. Matching the capacity that's on the wall just buys the same disappointment with a fresh warranty, and the step from a 5kW head to a 6kW one costs far less than living with it does.
Consent and electrical work
A standard high-wall or ducted system going into an existing home doesn't need building consent. Consent comes into it for structural changes, and for some new builds, where it usually sits under the consent the building work already has.
The electrical work is certified by a registered electrician and the refrigerant work is done under an approved filler licence. Both are legal requirements rather than preferences.
Two things worth raising at the site visit: body corporate or cross-lease rules if you share a title, and a neighbour close to the boundary, because the outdoor unit hums and moving it is a conversation now and an expense later. Palmerston North City Council is the authority on consent itself.
Looking after your heat pump
The filters are yours and they take two minutes. Lift the front panel, slide them out, rinse them under the tap and let them dry before they go back. Every few weeks while it's working hard is about right. A blocked filter starves the unit of air, so it runs longer for less warmth and you pay the difference on the bill.
Outside, keep the back and sides clear. Long grass, a stack of firewood or a fence built too close all stop it moving air properly, and a unit that can't breathe can't heat.
Watch how it behaves on a frosty morning, too. A defrost cycle now and then is normal and the unit will steam a little while it runs one. Constant icing isn't, and it usually points to the position rather than the machine.
Past that it's a job for someone with gauges: ice that won't clear, a breaker that trips, water inside, air that never gets properly warm, or a rattle that wasn't there last year. The annual service is when the charge and the electrics get checked.
Common questions about heat pump installation
How much does heat pump installation cost in Palmerston North?
Fitted, about $2,500 to $3,500 for a bedroom, $3,200 to $4,500 for a main living area and $4,500 to $6,500 for a large or open-plan space, with whole-home ducted from around $12,000. Inside those figures it comes down to the capacity the room needs, how far the pipework travels, and whether it is a two-storey or awkward-access job.
How long does the job take?
Most single high-wall installs are about half a day. Several units, a ducted system, or an awkward wall or two-storey layout can push it to a full day or more, and you'll be told which before anyone starts.
Why does my outdoor unit ice up so much?
The city sits in a basin where cold air settles overnight, so the frosts are sharper than the coast's. On top of that, a unit facing straight into the westerly has more damp air driven across it, and in heating mode the metal on the back of it is already below freezing, so frost builds faster and it stops to melt it off more often. Repositioning it usually fixes most of that.
Should I shelter the outdoor unit from the wind?
With position, yes. With a box around it, no. It needs air moving freely around it, so enclosing it costs more performance than the wind does. A spot on a sheltered side of the house gives you the benefit without the problem.
Do I need a corrosion-resistant unit?
No, that's a coastal expense and this is well inland. A standard unit is fine here, and the money saved is better spent on capacity, which is where the glazing and the cold in this basin actually cost you.
Can I install one myself?
No. Refrigerant work needs an approved filler licence in New Zealand and the wiring has to be certified by a registered electrician, so a DIY install is illegal and voids the warranty. Clearing access and agreeing the position are yours to sort.
Do I need consent?
Not for a standard high-wall or ducted system in an existing home. Structural work or some new builds can need it, and Palmerston North City Council is the authority. Body corporate and cross-lease rules are worth checking before booking.
What will it add to the power bill?
A right-sized unit warming a living room through a Manawatū winter usually adds somewhere between $25 and $60 a month, depending on the hours you run it and how much heat the house loses. You get three to four units of warmth for every unit of electricity, which no plug-in heater comes close to.
Get a price for your place
Send the rooms, your suburb and whether the house is single glazed. Your local installer will size it properly, pick a spot out of the wind, and give you a fixed price.