Best Pool Heat Pump for Perth Pools
Perth is easy heat pump country. The mistake is not buying too small. It is buying too big.
The best pool heat pump for most Perth pools is the Fairland AquaX Essential 21.2kW at $5,242. It is a full inverter unit that still gives 14.6 kW at 15°C air, which covers an uncovered 40,000 litre Perth pool from October to April, and it runs on a normal single phase supply with Wi-Fi control and a 5 year warranty.
Perth's mild spring and autumn mean you need less heat pump than Melbourne or Canberra for the same pool. Smaller pools, covered pools, tight budgets and narrow side passages each suit a different unit, so the full shortlist is below with real outputs and prices.
Want your exact size? Our pool heat pump sizing calculator has a Perth setting and works out the kW your pool needs from its volume, your season and whether you use a cover.
Short on time? See the Fairland AquaX Essential 21.2kW, the budget Midea 20kW, or browse every pool heat pump we sell.
The Perth shortlist at a glance
Each pick below is a live Waternex pool heat pump, ranked for Perth on output in spring air, noise, price and fit.
| Pick | Best for | Headline output | Output in cooler air | Power | Price |
|---|---|---|---|---|---|
| Fairland AquaX Essential 21.2kW | Best overall, 35,000 to 45,000L | 21.2 kW | 14.6 kW at 15°C | Single phase, hardwired | $5,242 |
| Midea M Series 20kW | Best budget | 21.8 kW | 17.0 kW (lower ambient) | Single phase, 25A circuit | $3,799 |
| Fairland AquaX Essential 13.8kW | Covered or smaller pools, quietest | 13.8 kW | 9.8 kW at 15°C | Single phase, 15A plug | $3,706 |
| SensaHeat ES Series 20kW | Longest heat exchanger warranty | 20.2 kW | Not published | Single phase, 19.5A | $4,700 |
| Guardian Platinum 25kW | Big pools, 50,000L plus | 25.0 kW | 19.9 kW at 15°C | Single phase, hardwired | $6,864 |
| Guardian Lux-V 20kW | Narrow side setbacks | About 20 kW | About 14.5 to 15 kW at 15°C | Single phase, 15A hardwired | $7,990 |
Prices current as of November 2026, AUD including GST. Outputs from each manufacturer's spec sheet on the product page. Headline outputs are at 26 to 27°C air.
What size pool heat pump a Perth pool needs
A Perth pool needs about 0.44 kW of heat pump per 1,000 litres uncovered to hold 28°C from October to April, and roughly half that with a pool cover.
| Pool volume | Perth, uncovered | Perth, with a cover |
|---|---|---|
| 30,000 litres | About 13 kW | About 7 kW |
| 40,000 litres | About 17.5 kW | About 10 kW |
| 50,000 litres | About 22 kW | About 12 kW |
Figures from our sizing calculator for Perth, October to April, 28°C, average wind and part sun. A windy, exposed backyard adds about 20%.
October is the month that sets the size in Perth, because it is the coldest month most people still want to swim in. The same 40,000 litre pool needs about 15% more heat pump in Melbourne. That is why a Perth pool can get away with a 21 kW unit where a Melbourne pool wants 25. The full pool heat pump size chart covers every city.
Best pool heat pump for Perth overall: Fairland AquaX Essential 21.2kW
The Fairland AquaX Essential 21.2kW is the best pool heat pump for Perth because its 14.6 kW at 15°C air comfortably covers a typical uncovered 40,000 litre Perth pool through spring and autumn, at $5,242.
Cold air COP is 7.6 to 4.5 at 15°C and the seasonal COP is 7.3. It draws as little as 0.38 kW when it ramps down to hold temperature. Sound is 45.1 to 57.0 dB(A) at 1 metre. It runs on 230V single phase, hardwired, with a spiral titanium heat exchanger, R32 refrigerant, Wi-Fi control and 5 years of warranty on the heat exchanger, compressor and parts. It also cools, rated at 7.7 kW, which earns its keep in a Perth February when a shallow pool turns into soup.
The size is the reason it wins. In Perth the 24 kW and 28 kW units mostly sit idle at part load. The 21.2 kW unit runs closer to its sweet spot, costs less and takes less space.
View the Fairland AquaX Essential 21.2kW →
Best budget pool heat pump for Perth: Midea M Series 20kW
The Midea M Series 20kW is the best budget pool heat pump for Perth, rated at 21.8 kW, or 17.0 kW in lower ambient conditions, for $3,799.
Headline COP is 5.2, falling to 3.6 in cooler air. It needs a 25A dedicated circuit (23A maximum draw), runs at 54 dB(A) normally or 40 dB(A) in silence mode at about 60% capacity, and carries a 5 year residential warranty. It is our top selling pool heat pump nationally.
Perth suits the Midea better than most cities. Its weak point is efficiency in cold air, and Perth simply has less cold air in swimming season than Melbourne or Canberra. For a 30,000 to 45,000 litre pool heated spring to autumn, it is $1,443 cheaper than the Fairland and does the job.
View the Midea M Series 20kW →
Best for covered and smaller Perth pools: Fairland AquaX Essential 13.8kW
The Fairland AquaX Essential 13.8kW is the best pool heat pump for a covered Perth pool up to about 45,000 litres, or an uncovered pool up to about 30,000 litres, at $3,706.
It gives 9.8 kW at 15°C air with a COP of 7.8 to 4.6, and a seasonal COP of 7.6. It is the quietest unit on this list at 41.8 to 54.2 dB(A) at 1 metre, it weighs 49 kg, and it plugs into a 15 amp outlet rather than needing a hardwired circuit, although that outlet still has to be suitably rated and installed by a licensed electrician. Same 5 year warranty as the bigger Fairland.
Perth blocks are getting smaller and the pump often sits a couple of metres from the neighbour's bedroom. This is the unit for that.
View the Fairland AquaX Essential 13.8kW →
Longest heat exchanger warranty: SensaHeat ES Series 20kW
The SensaHeat ES Series 20kW is the pick if warranty length matters most, with 25 years on the titanium heat exchanger, for $4,700.
It delivers 20.2 kW at 27°C air, a COP of 10.8 to 6.2, and runs on 230V single phase with a 19.5A maximum input current. Sound is 46.3 to 58.1 dB(A) at 1 metre and 26.3 to 38.1 dB(A) at 10 metres. It has Wi-Fi, R32 refrigerant and 7.7 kW of cooling. The rest of the warranty is shorter than the Fairland: 3 years on the compressor and 2 years on parts. It runs in air from 0°C to 43°C, which is no limitation in a Perth swimming season.
View the SensaHeat ES Series 20kW →
Best for big Perth pools: Guardian Platinum 25kW
The Guardian Platinum 25kW is the best pool heat pump for a large Perth pool of 50,000 litres or more, delivering up to 19.9 kW at 15°C air for $6,864.
Cold air COP is 8.0 to 5.2 at 15°C, it runs down to minus 15°C, and the compressor is a Mitsubishi rotary inverter. Sound pressure is 44 to 53 dB(A) at 1 metre. It runs on 220 to 240V single phase, hardwired, with a titanium heat exchanger. It is also big: 1330 x 548 x 930mm and 172 kg, so plan the pad and the access path first. For a normal Perth pool it is more heat pump than you need. For a big uncovered pool in an exposed coastal suburb, it is the right call.
View the Guardian Platinum 25kW →
Best for narrow side setbacks: Guardian Lux-V 20kW
The Guardian Lux-V 20kW is the best pool heat pump for a narrow side passage, because it blows its cold air straight up instead of out the side, at $7,990.
It gives about 14.5 to 15 kW at 15°C air with a COP of about 7.1 to 4.8, on single phase with a 15A hardwired connection. A side discharge unit jammed against a fence blows cold air into the fence and sucks it straight back in, and output falls. Top discharge fixes that. If the only spot for the pool gear is a 900mm gap beside the house, pay the extra.
View the Guardian Lux-V 20kW →
Perth conditions that change the choice
Three Perth conditions change which pool heat pump you should buy: the afternoon sea breeze, the hot dry summer and coastal salt air.
The afternoon sea breeze
The Perth afternoon sea breeze strips heat off an uncovered pool through evaporation, so an exposed pool in the western suburbs needs about 20% more heat pump than a sheltered one. A cover, a fence or a hedge on the windward side is cheaper than the extra kilowatts. Our guide on whether you need a pool cover with a heat pump has the numbers.
The hot dry summer
A Perth pool rarely needs heating from December to February, so a Perth heat pump earns its money in October, November, March and April. That is exactly why Perth owners get a longer swim season for less money than the east coast. Many Perth units will also run in cooling mode in late summer, which the Fairland and SensaHeat units on this list both offer.
Coastal salt air
A pool heat pump within a few hundred metres of the ocean faces salt laden air on its fins and casing, so ask us about coastal placement before you buy. Every unit here has a titanium heat exchanger for chlorinated and salt pool water. The casing and coil are what the sea air attacks, so hose the coil down with fresh water every few months.
Installation in Perth
Every pool heat pump on this list must be connected by a licensed electrician, and most need a dedicated circuit.
Check your switchboard has room for the circuit before the unit arrives. Leave the airflow clearances in the manual, sit the unit on a solid level pad, and keep it away from bedroom windows. Local councils can act on noise complaints, which is another point for the quieter Fairland 13.8kW or a top discharge Guardian. Our guide to pool heat pump installation requirements covers the detail.
Frequently asked questions
What is the best pool heat pump for Perth?
The best pool heat pump for most Perth pools is the Fairland AquaX Essential 21.2kW at $5,242, because it gives 14.6 kW at 15°C air, which covers an uncovered 40,000 litre Perth pool from October to April. The Midea M Series 20kW at $3,799 is the budget pick, and the Fairland AquaX Essential 13.8kW at $3,706 suits covered or smaller pools (prices as of November 2026).
What size pool heat pump do I need in Perth?
A Perth pool needs about 0.44 kW of heat pump per 1,000 litres uncovered for an October to April season at 28°C, so a 40,000 litre pool needs about 17.5 kW uncovered or about 10 kW with a pool cover. Exposed, windy backyards need about 20% more.
How much does a pool heat pump cost in Perth?
A pool heat pump for a typical Perth pool costs from about $3,700 to $5,300 for a well sized unit, as of November 2026, plus electrical installation. Large pools or narrow side setbacks push the price to $6,900 to $8,000.
Is a pool heat pump worth it in Perth?
A pool heat pump is usually worth it in Perth because the mild spring and autumn let a modest unit add two to three months of comfortable swimming each year at a high COP. Perth pools rarely need heat in summer, so the heat pump does its work in the shoulder seasons when it runs most efficiently.
Can I run a pool heat pump in a Perth winter?
A pool heat pump can run through a Perth winter, but heating a pool in June to August costs much more than spring and autumn heating, so most Perth owners heat from about September to May. A pool cover kept on whenever nobody is swimming makes winter heating far more affordable.
Want a Perth sizing done properly?
Send us your pool volume, your suburb, whether you have a cover and when you want to swim. We will size the heat pump against cooler air output, not the brochure number, and tell you straight if a smaller unit will do.
Comparing cities? See the best pool heat pump for Melbourne, our national best pool heat pumps in Australia roundup, or contact us with any question.
This guide is general information for Australian pool owners and is not a substitute for advice on your specific pool and site. Sizing figures are rules of thumb. Pool heat pumps are electrical appliances and must be installed by a licensed electrician on a suitably rated circuit. Confirm final sizing with us before you buy.