Astral HX 120 Gas Heater
Fast and efficient heating. The HX120 provides rapid heating for residential pools and spas, making it ideal for pool owners who want warm water quickly without running a heating system continuously.
Designed for lower maintenance. The copper finned tube heat exchanger is designed to handle high water flow rates, helping reduce scale build-up and lowering ongoing maintenance requirements.
Easy-to-use electronic controls. The electronic touch control interface and large LCD display make operation simple while also providing detailed system diagnostics and heater status information.
Built for Australian conditions. Designed and manufactured in Australia, the HX120 features a marine-grade powder coated cabinet built to withstand harsh outdoor environments and demanding weather conditions.
Reliable electronic ignition system. Electronic ignition provides dependable startup performance while improving convenience compared to manual ignition systems.
Smart diagnostic functionality. The large display interface can show ignition status, water pressure, temperature settings, and fault information to help simplify troubleshooting and servicing when needed.
Astral HX120 Specifications
| Product | HX70 | HX120 |
| Height | 720mm | 820mm |
| Width | 320mm | 390mm |
| Volume | 0.074m | 0.162m |
| Weight | 21.0kg | 25.0kg |
| Gas Connection | 15 | 20 |
Who It’s For
The HX120 is a great fit if you:
- Want fast heating for a residential pool or spa
- Have access to natural gas supply
- Prefer straightforward electronic controls
- Want a reliable heater with lower maintenance requirements
- Need efficient on-demand heating performance
- Want an Australian-made gas heater
You may want to consider an alternative heating solution if:
- Natural gas is not available at your property
- Long-term low-speed heating efficiency is the priority
- Your installer recommends a heat pump for your climate and usage patterns
Astral HX120 Compatibility & Requirements
- Pool type: Residential in-ground pools and spas
- Suitable applications: Pool and spa heating
- Fuel type: Natural gas (NG)
- Compatible pumps: Single speed and variable speed pool pumps
- Compatible pump ranges: AstralPool E-Series, CTX, Viron, and Viron XT pump ranges
- Compatible plumbing: Standard residential pool plumbing systems
- Compatible installations: Outdoor residential pool equipment areas
The HX120 is designed for residential pool systems where fast heating, simple operation, and reliable gas heating are priorities. Correct heater sizing and gas supply requirements should always be confirmed by a qualified pool technician or licensed gas fitter.
Installation & Maintenance
The Astral HX120 must be installed by a licensed gas fitter and qualified pool technician in accordance with Australian gas and electrical standards. Correct gas supply sizing, water flow, and ventilation are essential for safe and efficient operation.
Routine maintenance includes checking burners and ignition components, monitoring water chemistry, inspecting gas connections, and ensuring proper water circulation through the heat exchanger to help maximise heater lifespan.
The large LCD interface also assists with diagnostics by displaying operating information and fault conditions when required.
Astral HX120 Warranty
Earlier purchases:
- 5 years limited warranty
- Cabinet, refractory insulation, and combustion chamber: 5 years pro rata
- Heat exchanger, burner, inlet and outlet water headers: 2 years
- Components: 12 months
Purchases since 1 Oct 2020:
- 2 years
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