How much does a pool heater cost in Perth?

How much does a pool heater cost in Perth to run?

Running cost is three numbers multiplied: the heat the pool needs (58.1 kWh for each 1 °C on 50,000 litres), what the heater burns to make it, and the Perth tariff. The table works all three for each Synergy band and for gas.

For a heat pump, the efficiency is the maker’s own: its 13 kW inverter delivers 8.5 kW in 15 °C air for 1.78 kW of input, a COP of 4.78, and 7.0 at full output in 26 °C air. At 4.78 each degree takes 12.2 kWh. On Synergy’s Home Plan A1 at 33.2621c that is $4.05. At the generic COP of 5 used on our cost-to-heat page it is $3.87; the difference is the COP.

The Perth midday rule: run a Perth pool heat pump between 9am and 3pm on Synergy’s Midday Saver, where Super Off Peak is 8.8520c a kWh, and each 1 °C on a 50,000 litre pool costs about $1.08 instead of $4.05; the air is warmer then too, which lifts the COP.

The plan has conditions. Synergy says Midday Saver is for residential customers and needs an advanced (AMI) meter; where a suburb does not have AMI yet, the plan is not available. Its 3pm–9pm Peak of 55.3253c applies to the whole house, and its supply charge is 132.7806c a day against A1’s 119.2419c: $49.42 a year more. At $2.97 saved per degree, the pool alone covers that after about 16.6 °C of heating a year. Check your own household use before switching; the heater must also be on a timer, which the heater timer rule requires outside NSW.

Gas pool heater running cost in Perth

Perth’s mains gas runs on ATCO’s Mid-West and South-West gas distribution systems, which the Economic Regulation Authority says serve the Perth greater metropolitan area including Mandurah. Energy Policy WA sets the maximum price retailers can charge small users on a standard contract there: for 2026–27, a 27.61c daily supply charge, 19.06c a unit for the first 12 units a day and 17.20c beyond, where a unit is 3.6 MJ. Retailers can offer less on market contracts, and can add fees the government does not regulate.

One gas pool heater maker rates its smallest residential model at 196 MJ an hour of natural gas in for 44 kW of heat out, which is 80.8% efficient. Each 1 °C on a 50,000 litre pool takes 71.9 units of gas; a heater burns 12 units in about 13 minutes, so almost all of it is at 17.20c: $12.37 a degree. An hour of running is $9.36 and adds about 0.76 °C, before losses.

In Perth, gas costs about 3.1 times more per degree than a heat pump on Synergy A1, and buys speed: about 0.76 °C an hour against 0.15 °C for a 13 kW heat pump in 15 °C air. That suits a pool heated for weekends. WA law requires all gasfitting work to be done by a person with a gasfitting licence from Building and Energy, and the fitter must give you a Notice of Completion within 48 hours. Gas against heat pump against solar is compared on solar vs gas vs heat pump heating.

What does a pool heater cost to buy for my pool in Perth?

We found no Perth-specific installed price list that we could verify, and the national cost guides we checked do not publish a Perth pool-heating page. These are unit prices from businesses that sell nationally, read on 28 October 2026, before installation:

• Heat pump, 13 kW (one maker advises 30–50 m³ pools): $3,296–$4,630.07 across four makes at one national retailer.
• Heat pump, 20–21 kW: $4,762–$8,104 at the same retailer.
• Gas heater, 196–420 MJ/h: $6,550–$7,425 at one online pool shop, the same price for natural gas and LPG.
• Solar collectors: one distributor’s recommended retail price for a 1.2 × 3.85 m rigid panel is listed at both $707 and $637.51 on the same April 2026 page, about $137.99–$153.03 per m², uninstalled.

Installation is extra and varies with the run of pipe, the switchboard, the gas line and roof access. Ask for the unit, plumbing, electrical, gas or roof work and any cover as separate lines. WA’s Building and Energy says only licensed electricians and gasfitters may work on a home’s electrical or gas installations. Unit prices by kW for the whole country are on how much a pool heat pump costs and installed ranges on what a pool heater costs installed.

When does a Perth pool need heating?

The Bureau of Meteorology’s Perth Metro station (1994–2026) gives the shape of the season. These are air temperatures, not pool water:

In the shoulder months the nights average about 10–14 °C, which is when a heat pump works hardest and the 15 °C rating is the honest one; daytime maximums are about 21–27 °C, which is why heating in the 9am–3pm window helps twice. Solar exposure is high from October to March, which suits solar collectors for stretching the season, and falls to about a third of January’s by June.

Whatever the heater, a cover does most of the work at night; choosing a pool cover covers the options, and the building code requires one with a gas or heat pump heater outside NSW. Whether heating pays at all is on is a pool heater worth it. If heating is part of a new pool, compare pool quotes with the heater as a line item; businesses in Perth are listed in our directory, and the whole build is priced on what a pool costs in Perth.

Common questions

Sources

• Synergy: Home Plan A1, 33.2621 cents per unit and 119.2419 cents per day including GST, as at 1 July 2026 (read 28 October 2026)
• Synergy: Midday Saver, Super Off Peak 9am–3pm 8.8520c, Peak 55.3253c, Off-peak 24.3431c, supply 132.7806c, eligibility (read 28 October 2026)
• Energy Policy WA: Household gas pricing, 2026–27 regulated maximum prices, Mid-West/South-West area
• Economic Regulation Authority WA: Mid West and South West gas distribution systems, areas served
• WA Building and Energy: Having gasfitting work done? (licensing and Notice of Completion)
• WA Government: ‘Don’t DIY’ electrical and gas safety campaign (last updated 13 October 2026)
• Bureau of Meteorology: climate statistics, Perth Metro 009225, all years (read 28 October 2026)
• Maker C: inverter pool heat pump specification sheet, capacity and input at 15 °C and 26 °C air (manufacturer-published, distributor-hosted)
• Gas pool heater maker: residential datasheet, MJ/h input and kW output (manufacturer-published)
• National pool-parts retailer: pool heat pump collection, unit prices by kW (retailer-published, read 28 October 2026)
• Online pool shop: residential gas pool heaters, prices by model (retailer-published, read 28 October 2026)
• Solar pool heating distributor: recommended retail prices for collectors, updated April 2026 (distributor-published)

General information only, current at 2026-10-28. Pool rules differ by state and by council, and penalty amounts are updated regularly. Confirm your own obligations with your council or a registered inspector before acting.