How a heat pump works
A heat pump works like a fridge in reverse. A fan draws in outside air, a refrigerant absorbs its heat, and a compressor concentrates that heat into the water tank. Because it moves heat rather than making it, a heat pump typically uses around a third or less of the power of a standard electric tank for the same hot water.
Getting the most from a heat pump on the coast
Placement matters. Near the beach we look for a sheltered spot or a coastal-rated model to slow corrosion of the coil. We keep units away from bedroom windows because they make a low hum while running. If you have rooftop solar, setting the heat pump to run in the middle of the day uses your own power and can cut running costs further.
Incentives
Heat pump models listed on the Clean Energy Regulator's register (up to 425 litres) are eligible for small-scale technology certificates (STCs) under the federal Small-scale Renewable Energy Scheme, which reduce the price you pay. State programs change from time to time, so ask us what applies when you get a quote.
Heat pump installation
We install heat pumps as a new system or as a replacement for an old electric or gas unit. Installation includes positioning for airflow and noise, reconnecting to the existing hot water supply, fitting a tempering valve and setting the heat pump's built-in timer to solar hours if you have panels. If a new circuit is needed, it's run by a licensed electrician.
Heat pump hot water replacement
Many Sunshine Coast homes built in the last 15 years have a first-generation heat pump that's now out of warranty. If yours has failed, we can replace it like for like, or with a quieter, more efficient model.
Heat pump hot water repairs
Common heat pump faults include fan and compressor failures, blocked condensate drains, sensor faults and refrigerant issues. We diagnose the fault and tell you honestly whether a repair or a replacement makes more sense.
Heat pump hot water cost
Heat pumps cost more upfront than an electric tank, but STC incentives on eligible models reduce the price and running costs are much lower. See the cost guide and heat pump vs electric.
Replacing a failed heat pump?
If your heat pump has failed and you'd rather switch to an electric tank or gas continuous flow, see heat pump and solar replacement, including the honest trade-off on running costs.
Common questions
Are heat pumps worth it on the Sunshine Coast?
For most homes, yes. The warm, mild climate means heat pumps run efficiently all year, and they use far less electricity than a standard electric tank. Savings are biggest when replacing an electric system on a continuous tariff.
Are heat pump hot water systems noisy?
They make a low hum, similar to an air conditioner's outdoor unit. Positioning the unit away from bedrooms and neighbours' windows avoids most noise complaints.
Do heat pumps work in winter in the hinterland?
Yes, but they work harder in cold air. For homes on the range around Maleny and Montville we recommend models rated for cooler temperatures, and setting them to run during the warmest part of the day.
Sources and further reading
- Business Queensland: hot water systems (temperature control devices on new and replacement systems)
- QBCC: Form 4 notifiable work (installing, replacing or removing a water heater)
- Clean Energy Regulator: solar water heaters and air source heat pumps (STC eligibility)
- Residential Tenancies Authority: emergency and routine repairs
Heat pump hot water near you
We cover every suburb on the Sunshine Coast and in Noosa. Popular areas include: