Small room heat pump package, installed
For rooms our calculator sizes under 4.5 kW: a bedroom, a study, or an insulated lounge of up to about 34 m² in a mild climate. You get a 2.5 to 4.2 kW high-wall heat pump with a standard back-to-back install and the electrical certificate. Top5.nz puts a small-room install at $2,500 to $3,500.
Is this the right size?
- Calculator result
- Under 4.5 kW
- Unit fitted
- 2.5, 3.5 or 4.2 kW high-wall
- Rooms, mild or moderate climate
- up to about 34 m²
- Rooms, cold climate (zones 5–6)
- up to about 28 m²
- Suits
- Bedrooms, studies, small lounges and most insulated living rooms in mild and moderate climates
| Floor area | Mild or moderate | Cold (zones 5–6) |
|---|---|---|
| 15 m² | 2.0 kW ✓ | 2.3 kW ✓ |
| 20 m² | 2.6 kW ✓ | 3.1 kW ✓ |
| 25 m² | 3.3 kW ✓ | 3.9 kW ✓ |
| 30 m² | 3.9 kW ✓ | 4.7 kW |
✓ = this package. High studs and no insulation raise the figure; use the calculator for your room.
Included in the price
- Indoor unit. High-wall unit mounted on an external wall of the room
- Outdoor unit. Ground-mounted on a pad or brackets directly behind the indoor unit (back-to-back)
- Refrigerant pipe. Up to 3 metres, insulated, with the wall penetration sealed
- Pipe capping. Up to 2 metres of cover on the outside wall
- Condensate drain. Up to 4 metres to a suitable drain point
- Electrical. Up to 15 metres of cable to the switchboard, a single-storey run, and the electrical certificate
- Commissioning. Pressure test, vacuum, gas charge check, test run and a walk-through of the remote
- Warranty. Manufacturer's warranty registered in your name; the installer's workmanship warranty passed to you in writing
Allowances follow the published NZ standard back-to-back definition (Harvey Norman NZ) until our installer's are agreed.
Extras, only if the site check finds them
- Extra refrigerant pipe beyond 3 metres: $50–$80 per metre
- Outdoor unit on a roof, high wall bracket or second storey: Priced at the site check
- Pipe run through the roof space or under the floor: Priced at the site check
- New circuit or switchboard work: Priced at the site check
- Removing an old heat pump: Priced at the site check
How booking works
Book online
Room, install details and contact, then a $200 refundable deposit.
Site check
Our installer checks the wall, pipe run and switchboard, in person or from your photos.
Confirmed price
Standard install: the price stands. Extras: priced in writing. Accept, or cancel for a full refund.
Install and certificate
Fitted and commissioned with the electrical certificate. The balance is invoiced after, deposit credited.
Brands
You choose a brand preference when you book, from the range our installer supplies: Mitsubishi Electric, Daikin, Panasonic, Fujitsu (GENERAL AIRSTAGE), Toshiba, Hitachi. The model and its rated heating output are confirmed before you accept.
Where you can book
- Auckland · waitlist
- Wellington · waitlist
- Christchurch · waitlist
- Hamilton · waitlist
- Tauranga · waitlist
- Dunedin · waitlist
- Palmerston North · waitlist
- Napier & Hastings · waitlist
- Nelson · waitlist
- Rotorua · waitlist
- Whangārei · waitlist
- New Plymouth · waitlist
- Invercargill · waitlist
- Queenstown · waitlist
- Central Otago · waitlist
Small room questions
What size room does the small room package suit?
Any room our size calculator puts under 4.5 kW. With ceiling and underfloor insulation and a 2.4 m stud that's up to about 34 m² in a mild or moderate climate, or about 28 m² in Christchurch, Dunedin and further south.
How much does a small room heat pump cost installed?
Top5.nz's August 2026 guide puts a small-room high-wall install at $2,500 to $3,500, typically $3,000. Our fixed price is published once the installer for your region is contracted.
Is a bigger unit better for a bedroom?
No. An oversized unit costs more to buy and cycles on and off more than it needs to. Size for the room; the calculator shows the working.
What if my install isn't back-to-back?
The installer's site check measures the pipe run. Extra pipe beyond the standard allowance is priced per metre and shown to you before you accept. Your deposit is refundable until you do.
Tell us the room. We'll tell you the size, the price and exactly what's included.
Size the room in two minutes. You see the kW, the package it needs and the standard install spelled out. Ducted, several rooms or a tricky wall? Ask for a custom quote.