Gridly
WA 6001 · Cottesloe
Heat Pump Hot Water Installation in Perth, WA
Replace your gas or electric hot water system with an efficient heat pump. Find a vetted installer in Perth and start saving.
Get free quotesHot Water Snapshot for Perth
Key data for heat pump sizing and savings estimates.
0
Population
2.5
Avg household size
Temperate (warm)
Climate zone
125L
Est. daily hot water
$890
Annual cost (electric)
$254
Annual cost (heat pump)
3.7 yrs
Est. payback period
$2,330
Cost after STC rebate
Zone 2
Dwelling Mix in Perth
Housing composition based on census dwelling structure data.
0%
0%
0%
Perth is predominantly houses (0%), making it well-suited for heat pump hot water installation. Most properties will have adequate outdoor space for a heat pump unit.
Why Install a Heat Pump in Perth?
Perth's temperate climate is well-suited to heat pumps. Performance remains strong through winter with most units rated to operate down to -7°C.
Even during Perth's cooler months, heat pumps maintain a COP above 2.5, meaning they use less than half the electricity of a conventional electric system.
A typical 2.5-person household in Perth could save approximately $636 per year by switching from a conventional electric hot water system. With a 270L system costing around $3,500 before rebates, and an STC rebate of $1,170 (Zone 2), your net cost is approximately $2,330 — paying for itself in around 3.7 years. After that, you save $636 every year for the system's 15+ year lifespan.
Hot Water Cost Comparison
| System Type | Annual Energy | Annual Cost | 10-Year Cost |
|---|---|---|---|
| Electric (resistive) | 2,966 kWh | $890 | $8,900 |
| Gas | ~2,373 MJ | ~$623 | ~$6,230 |
| Heat Pump Lowest cost | 847 kWh | $254 | $2,540 |
Estimates based on a 2.5-person household using ~125L of hot water daily. Electricity costed at $0.30/kWh. Actual costs vary by tariff and usage.
Recommended Tank Size for Perth
A 250-300L tank is ideal for Perth's average 2.5-person household.
150-200L
1-2 people
250-300L
2-4 people
315L+
4+ people
Heat Pump Rebates in WA
STCs provide an upfront discount of $800 to $1,000 for heat pump installations.
WA natural gas phase-out timelines make heat pumps increasingly relevant for gas hot water replacements.
Rebate values are indicative and subject to change. Confirm eligibility with your installer.
Popular Heat Pumps
How Heat Pump Installation Works
Hot water assessment
Household size, existing system type, and installation location are assessed to determine the right heat pump.
System selection and quote
Your installer recommends a suitably sized heat pump and provides a detailed quote including any applicable rebates.
Installation
Installation typically takes half a day to one full day, including removal of your old system and connection of the new heat pump.
STC paperwork and rebate processing
Your installer handles the Small-scale Technology Certificate paperwork and any state rebate applications on your behalf.
Frequently Asked Questions
How much hot water does a Perth household use? ▼
A typical 2.5-person household in Perth uses approximately 125L of hot water per day, based on an average of 50 litres per person.
How much does a heat pump cost in WA? ▼
Heat pump hot water systems in WA typically cost $2,000 to $4,500 before rebates and STCs. After applying available incentives, the upfront cost can drop significantly.
Will a heat pump work in Perth's climate? ▼
Yes. Perth's temperate climate suits heat pumps well. Most models are rated to operate down to -7°C, so winter performance remains strong.
How noisy are heat pumps? ▼
Modern heat pump hot water systems operate at 40-50 dB, similar to a quiet conversation. Most units are quieter than a standard air conditioner. Check your local council's noise regulations for any placement restrictions.
What is the payback period for a heat pump in Perth? ▼
A 270L heat pump system in Perth costs approximately $3,500 before rebates. With an STC rebate of $1,170 (Zone 2), the net cost is around $2,330. At $636 annual savings versus electric hot water, the payback period is approximately 3.7 years.
Nearby Suburbs
Heat pump installers in suburbs near Perth.
Related
Population and household data: ABS 2021 Census. Hot water estimates are based on 50L per person per day and an average electricity rate of $0.30/kWh. Actual costs vary by tariff, usage, and system efficiency.