Pool Heating Costs Australia: Heat Pump vs Solar vs Gas

Pool heating in Australia carries two price tags: the system and the power bill. Upfront, an installed pool heat pump costs from about $4,100 for a 9kW unit to about $10,600 for a 24kW unit — our current installed prices in South East Queensland. Running costs for a typical covered 7m pool: a heat pump costs $600–$1,200 a year to hold 28°C year-round, solar pool heating costs $150–$400 a year in booster-pump power for a September-to-April season, and gas costs $2,000–$4,000+ a year run continuously. Brisbane's climate changes the maths: winter air stays mild enough for a heat pump to keep working efficiently through July, and the unheated season already runs November to March — you're paying to extend a long season, not rescue a short one. The cheapest way to heat a pool overall is a correctly sized heat pump under a thermal blanket.

We install 250+ fibreglass pools a year across SEQ, and heating is on most of those quotes — so the figures below are the prices we fit at, not survey averages, plus the sizing and running-cost questions we answer at every free site visit.

What does pool heating cost in Australia?

Pool heating costs $4,100–$10,600 upfront for an installed heat pump, and between $150 and $4,000+ a year to run depending on the system. The comparison, for a typical 7m fibreglass pool in Brisbane held at 28°C under a blanket:

System	Upfront	Typical running cost	Season it delivers
Heat pump	$4,100–$10,600 installed (9kW–24kW, our range)	$600–$1,200/year	Year-round, any weather
Solar pool heating	Quoted per roof — collector area and orientation set the price	$150–$400/year (booster-pump power only)	Sept–April; fades in winter
Gas heater	Unit plus gas line, quoted per site	$2,000–$4,000+/year, or $10–$25 per swim session heated on demand	Year-round, fastest heat-up
Electric element	Unit only, cheapest to buy	About five times a heat pump's power bill for the same heat	Year-round, small volumes only

We install the heat pumps and thermal blankets ourselves; solar collectors and gas lines come from specialist suppliers, which is why those upfront figures are site-quoted rather than fixed. Heating is also one line on a bigger number — where it sits inside the total pool installation cost matters more than the heater price alone. A heated plunge pool package lands roughly $45,000–$60,000 installed; the pricing quiz narrows that range to your block in about two minutes.

Pool heat pump costs

A pool heat pump costs between $4,100 and $10,600 installed in South East Queensland, across outputs from 9kW to 24kW. It works like a reverse-cycle air conditioner running backwards: a fan draws outside air across a coil, refrigerant absorbs the warmth, and a heat exchanger transfers it into the pool water as it circulates through the filtration system. For every kilowatt of electricity a heat pump draws, it delivers around five kilowatts of heat into the water — that ratio (the COP) is why the heat pump has become the default pool heating choice in Queensland. Newer inverter models ramp the compressor up and down rather than switching on and off, so they run quieter and cheaper again once the pool is at temperature.

These are the Sunlover Oasis heat pumps we install, at live prices from our quoting system. Fitted alongside a new pool build, the plumbing and electrical runs are done in one hit — the cheapest way to add heating.

Sizing matters more than brand. An undersized pump runs flat-out all day and still struggles in winter; a correctly sized one cycles gently and costs less to run.

What size heat pump do I need?

Match kilowatts to litres, your target temperature, and how far into winter you want to swim. As a working guide for SEQ:

Pool size	Typical volume	Heat pump
Plunge pools to 5m	roughly 10,000–20,000L	9kW
6–7m pools	roughly 25,000–35,000L	13kW
7.5–8.5m pools	roughly 35,000–45,000L	19kW
9m+ family pools	roughly 45,000L+	24kW

Two adjustments worth knowing: size up one unit if you want genuine mid-winter swimming rather than an extended season, and likewise if the pool is heavily shaded or wind-exposed. A slightly larger pump costs more upfront but reaches temperature faster and rests more.

The shell material plays into the same sum. An Aqua Technics fibreglass shell insulates noticeably better than concrete, so the same kilowatts hold temperature on less power — one of the quieter running-cost advantages of fibreglass pools.

What a heat pump costs to run, with the arithmetic shown

A 13kW heat pump running a 7m pool costs roughly $95 a month in the shoulder seasons and $140–$190 a month in a Brisbane winter. Here's the sum behind that, so you can rerun it for your own pool: a 13kW-output pump at a COP of 5 draws about 2.6kW of electricity. Four hours of running a day is 10.4kWh; at a typical QLD tariff of $0.30/kWh that's $3.12 a day, about $95 a month. In June and July the same pump runs six to eight hours a day to replace overnight losses — 15.6–20.8kWh, or $140–$190 a month on those assumptions; a tariff above $0.30/kWh, a pool bigger than 7m, a thermostat above 28°C or nights with the blanket left off push real bills into the upper half of the $150–$250 winter band below. Over a year on a covered pool it adds to the $600–$1,200 band.

By season, on a covered 7m pool:

• Summer (Dec–Feb): close to nothing — the pool holds temperature on its own
• Shoulder months (Sep–Nov, Mar–May): typically $50–$120/month
• Winter (Jun–Aug): typically $150–$250/month if you keep swimming right through

Running the pump in the warm middle of the day — when the air is warmest and the pump is most efficient — trims these numbers, and suits rooftop solar PV owners doubly. Every extra degree on the thermostat adds roughly 10–15% to running costs, which is why 27–28°C is the sweet spot for most families rather than 30°C.

How long does it take to heat a pool?

A correctly sized heat pump raises pool temperature by roughly 0.5–1°C per hour of running, so bringing a 30,000L pool from 18°C to 28°C takes one to two days of daytime running. Holding temperature after that is the easy part — the pump only replaces overnight losses, typically a few hours a day. The right habit is to set the temperature once and let the system maintain it; heating from cold every weekend is the most expensive way to own a heat pump, and that occasional-blast pattern is the one job gas does better.

Noise and placement

A modern pool heat pump sounds like a reverse-cycle air-conditioner outdoor unit — a low fan hum, quieter again on inverter models once the pool is at temperature. Placement still deserves thought at design stage: the unit needs clear space to breathe (boxed into a tight enclosure it recycles its own cold exhaust air and efficiency drops), it should sit away from boundary fences near neighbouring bedrooms, and the closer it sits to the filtration equipment the cheaper the install and the lower the pipe heat loss. We design the equipment pad as part of every install, so this is sorted on the plan before anything is dug — one of the details settled in our installation process.

Solar pool heating costs

Solar pool heating costs $150–$400 a year to run — the heat itself is free, and the only power bill is the small booster pump that circulates pool water through collector tubes on the roof. Upfront, a solar system is priced per roof: collector area, orientation and shading set the quote, which is why no honest fixed figure exists for it.

The running-cost win comes with a season limit. Solar output depends on roof heat, which is weakest exactly when the water is coldest: in a Brisbane July, unboosted solar generally cannot hold a pool at swimming temperature. A run of cloudy days means a cool pool even in the shoulder months, and roof orientation and available panel area cap what solar can do on a given house.

So the comparison that decides most SEQ buyers splits cleanly. If the goal is a longer summer — October swimming instead of November — solar does it cheapest. If the goal is swimming in June, only a heat pump or gas gets there, and gas costs several times more per year. On a new build we usually find a single well-sized heat pump plus a blanket beats running both systems, on total cost and on simplicity.

Gas and electric heating costs

A gas pool heater costs $2,000–$4,000+ a year run continuously, or $10–$25 per swim session heated on demand — the highest running cost of any pool heating system, paired with the fastest heat-up. Gas wins two specific jobs: spas, where you want the water hot within the hour rather than by tomorrow, and holiday homes heated for a weekend then left cold. For a family pool held at temperature week after week, the same gas bill buys three to five years of heat pump running.

Electric element heating — a resistance coil that warms water directly, the same principle as a kettle — is the cheapest heater to buy and the most expensive to run per degree. The physics is fixed: a resistance element delivers one kilowatt of heat per kilowatt of electricity (a COP of 1), where a heat pump delivers about five. Delivering the 52kWh of heat a 13kW heat pump puts into the pool over a four-hour run would cost about $15.60 in element electricity at $0.30/kWh, against $3.12 through the heat pump — five times the bill for identical warmth. Elements make sense for small spa volumes and nowhere else; for a swimming pool, the query "electric pool heating" almost always resolves to a heat pump, which is also electric but moves heat instead of generating it.

What's the cheapest way to heat a swimming pool?

The cheapest way to heat a swimming pool is a thermal blanket paired with a correctly sized heat pump — the blanket keeps the heat, the pump replaces only what escapes. Evaporation accounts for the majority of heat loss from an uncovered pool, and a pool cover can cut that loss by up to 50%. A covered pool reaches temperature faster, a smaller pump does the job of a bigger one, winter running costs drop by hundreds of dollars a year, and you lose less water and chemicals to evaporation.

Ranked by total cost of warm water:

1. A thermal blanket alone — $2,190–$3,140 installed — stretches the free-swimming season a few weeks each side of summer with zero running cost.
2. Solar plus a blanket buys the longest cheap season: $150–$400 a year, September to April.
3. A heat pump plus a blanket buys any season you choose, at $600–$1,200 a year on a 7m pool.
4. Gas is the costliest continuous option and earns its place only for rapid, occasional heating.

We install Daisy thermal blankets with rollers, sized to your exact pool model, from about $2,190 to $3,140 installed depending on pool size:

The roller matters more than it sounds. A blanket that's easy to take off and put back on gets used every day; one you have to drag and fold ends up living in the shed. With a roller, covering the pool is a thirty-second job for one person — budget for the blanket before you budget for a bigger heat pump, because it's the cheaper way to buy the same warm water.

Heating costs in Brisbane and SEQ

A heated pool in Brisbane costs less to run than the same pool in a southern capital, for two compounding reasons: the water starts warmer and the heat pump works harder per watt. An unheated SEQ pool is comfortable roughly November to March, so heating buys the months either side rather than carrying the whole year. And because a heat pump extracts warmth from the air, Brisbane's mild winter days keep it operating near its rated efficiency in July — the month a colder city's pump both faces a bigger temperature lift and delivers it less efficiently.

What Brisbane owners actually spend, on a covered 7m pool held at 28°C: near zero across summer, $50–$120 a month through the shoulders, $150–$250 a month swimming right through June to August — the $600–$1,200 annual band. Most SEQ families settle at 26–29°C; chasing 30°C adds 10–15% per degree for warmth few swimmers notice.

The cheapest heated-pool setup in Brisbane is a plunge pool. A 3–5m plunge pool holds a quarter to a third of the water of a family pool; pair one with a 9kW heat pump and a Daisy blanket and the winter power bill runs in the tens of dollars a month — at a COP of 5 a 9kW pump draws 1.8kW, and three hours a day costs about $1.60 at $0.30/kWh. With installed plunge pools at roughly $45k–$60k, a fully heated year-round plunge pool often costs less than an unheated full-size pool.

Can you add heating to an existing pool?

Yes — a heat pump retrofits to any existing pool with accessible plumbing, and it's the most common heating retrofit we're asked about. Three site realities decide how clean the job is:

• Plumbing access. The heat pump tees into the return line after the filter. If the equipment pad is reachable and the pipework exposed, it's a straightforward fit; buried or embedded plumbing means excavation and a bigger bill.
• Pad space and airflow. The unit needs clear space around it to breathe — a pad already crowded by the filter and chlorinator may need extending before a pump can sit on it without recycling its own cold exhaust.
• Power supply. Larger units need their own dedicated circuit, and a 19kW or 24kW pump can require a switchboard capacity check. An electrician's hour up front is cheaper than discovering it on install day.

A thermal blanket retrofits to any pool trivially — it's cut to your pool's shape and the roller sits on the coping. Solar retrofits depend on roof suitability; gas depends on a gas line reaching the pad. The economics still favour heating at build time, when trenches are open and the electrical run is one job instead of two, which is why heating is on most of our new-pool quotes — but a retrofit heat pump on a covered pool pays its way in any Brisbane backyard. Book a consultation and we'll size a unit for your pool and quote it exactly.

FAQs

How much does it cost to heat a pool in Australia?

Upfront, an installed pool heat pump costs about $4,100 for a 9kW unit up to about $10,600 for 24kW at our current SEQ prices; solar and gas systems are site-quoted. Running costs for a typical covered 7m pool held at 28°C: a heat pump costs $600–$1,200 a year, solar pool heating costs $150–$400 a year in booster-pump power, and gas costs $2,000–$4,000 or more a year run continuously.

How expensive is it to heat up a pool?

Heating a pool from cold is the expensive part; holding temperature is cheap. A correctly sized heat pump raises the water roughly 0.5–1°C per hour, so a 30,000L pool goes from 18°C to 28°C in one to two days of daytime running. After that the pump only replaces overnight losses — a few hours of running a day, roughly $50–$250 a month in Brisbane depending on season. Set the temperature once and maintain it; reheating from cold every weekend is the costliest way to run a heat pump.

What's the cheapest way to heat a swimming pool?

A thermal blanket plus a correctly sized heat pump. Evaporation causes the majority of heat loss from an uncovered pool, and a blanket cuts that loss by up to 50%, so a smaller pump holds temperature for less power — $600–$1,200 a year on a covered 7m Brisbane pool. Solar is cheaper still to run ($150–$400 a year) but fades in winter, so it buys a longer summer rather than a chosen season. The blanket alone, from about $2,190 installed, is the highest-return single item.

Can you add heating to an existing pool?

Yes. A heat pump tees into the return line after the filter and retrofits to any pool with accessible plumbing; the practical checks are pipework access, clear pad space for airflow, and whether the switchboard can carry a dedicated circuit for larger units. A thermal blanket retrofits to any pool. Solar depends on roof area and orientation; gas needs a gas line to the equipment pad. Retrofitting costs more than heating fitted at build time, when trenching and electrical runs are done together.

What temperature should a heated pool be?

Most families settle on 26–29°C. Every extra degree adds roughly 10–15% to running costs, so 27–28°C is the sweet spot — and a pool blanket does more for comfort per dollar than a higher thermostat setting.

Is a heat pump worth it in Queensland?

For most Brisbane families, yes. A heat pump turns a four-to-five-month unheated season into swimming most or all of the year, for $600–$1,200 a year on a covered 7m pool — and Queensland is where the maths works best, because mild winter air keeps the pump efficient in the exact months it's needed. The case is strongest on covered pools and compact pools; a heated, covered plunge pool runs on tens of dollars a month in winter.