If you're looking for the best way to heat your swimming pool, you'll almost certainly compare a pool heat pump with a gas heater. Both systems are capable of heating your pool, but they work very differently and are suited to different applications.
At Austek, one of the most common questions we're asked is: "Should I choose a pool heat pump or a gas heater?" The answer depends on how you use your pool, how often you swim and what you want from your heating system. This guide compares both options to help you make the right decision.
How Does a Pool Heat Pump Work?
A pool heat pump extracts warmth from the surrounding air and transfers it into your pool water. Rather than creating heat directly, it moves heat using advanced refrigeration technology, making it one of the most energy-efficient ways to heat a swimming pool. Modern full inverter pool heat pumps automatically adjust their output to maintain a consistent water temperature while minimising electricity consumption.
How Does a Gas Pool Heater Work?
A gas heater burns natural gas or LPG to produce heat. The heated water is then circulated back into the swimming pool. Gas heaters are capable of heating water very quickly, making them popular for spas and pools that are only heated occasionally.
Installation Cost
- Both systems require professional installation.
- A pool heat pump requires a suitable electrical supply and adequate airflow around the unit.
- Gas heaters require either a natural gas connection or LPG supply, together with appropriate gas pipe sizing and installation by a licensed gas fitter.
- Installation costs vary depending on the property and existing services.
Running Costs
This is where the biggest difference usually occurs. Modern inverter pool heat pumps are widely recognised as one of the most economical ways to heat a swimming pool over the long term because they transfer heat rather than generate it directly. Gas heaters provide rapid heating but generally have higher ongoing operating costs when used regularly throughout the swimming season. For homeowners who swim several times each week, a modern inverter heat pump will often provide lower long-term operating costs.
Heating Speed
Gas heaters have one major advantage. They heat water very quickly. If you only use your pool occasionally and want it warm within a short period of time, a gas heater can be an excellent option. Pool heat pumps work differently. They gradually heat the pool and are designed to maintain a comfortable swimming temperature throughout the season rather than provide rapid heating on demand.
Energy Efficiency
Modern inverter pool heat pumps are extremely energy efficient because they transfer heat from the surrounding air instead of producing it directly. This allows them to deliver several units of heating for every unit of electricity consumed under suitable operating conditions. Gas heaters convert fuel into heat directly, making them effective for rapid heating but generally less economical for continuous pool heating.
Which System Is Quieter?
Modern inverter pool heat pumps are designed to operate quietly. As the pool reaches the desired temperature, compressor and fan speeds automatically reduce, resulting in lower operating noise. Gas heaters are generally louder while operating due to the combustion process and burner operation.
Which System Lasts Longer?
Both systems can provide many years of reliable service when correctly installed and maintained. Pool heat pumps fitted with titanium heat exchangers are particularly well suited to Australian swimming pools, including saltwater pools. Regular servicing and correct water chemistry are important regardless of which heating system you choose.
Which Is Better for Solar Homes?
If your home has rooftop solar, a pool heat pump offers a significant advantage. Many homeowners choose to operate their heat pump during the middle of the day when their solar panels are producing excess electricity. This allows the pool to be heated using renewable energy while reducing reliance on electricity from the grid. Gas heaters cannot take advantage of rooftop solar in the same way.
Which Heating System Is Right for You?
A pool heat pump may be the better choice if you:
- Swim regularly.
- Want lower long-term running costs.
- Have rooftop solar.
- Want quiet operation.
- Plan to heat your pool for an extended swimming season.
A gas heater may be the better choice if you:
- Only use your pool occasionally.
- Need rapid heating.
- Frequently heat an attached spa.
- Already have natural gas available.
Quick Comparison
Pool Heat Pump
- Best for regular swimming
- Lower long-term running costs
- Energy efficient
- Quiet operation
- Excellent with rooftop solar
- Gradual heating
- Maintains consistent temperatures
Gas Heater
- Best for occasional swimming
- Rapid heat-up
- Higher operating costs
- Excellent for spas
- Uses natural gas or LPG
- Fast recovery after use
Austek Tip
If you swim regularly throughout spring, summer and autumn, a modern inverter pool heat pump will usually provide the best balance of comfort, efficiency and operating costs. If rapid heating is your highest priority, particularly for a spa or occasional use, a gas heater may be the better option.
Quick Links -
- Austek Enviro Series
- Pool Heat Pump Calculator
- Contact Austek
- PV-Ready Pool Heat Pumps
- What size of heat pump do i need?
Frequently Asked Questions
Is a pool heat pump cheaper to run than gas? - For regular swimming, modern inverter pool heat pumps generally provide lower long-term running costs than gas heaters.
Which heats a pool faster? - Gas heaters heat water much more quickly than pool heat pumps.
Which system lasts longer? - Both systems can provide many years of reliable operation when properly installed and maintained.
Can I use rooftop solar with a pool heat pump? - Yes. Many homeowners choose to run their pool heat pump during daylight hours to maximise the use of excess solar generation.
Final Thoughts
There is no single heating system that is perfect for every swimming pool. The best choice depends on how you use your pool, your budget and your long-term goals. For homeowners who enjoy regular swimming and want lower operating costs, a modern inverter pool heat pump is often the preferred solution. For occasional swimming or rapid heating, particularly for spas, a gas heater remains an excellent option.
If you're unsure which heating system is right for your pool, Austek's experienced dealer network can help you compare your options and recommend the most suitable solution for your home.
