Astral HX 120 Gas Heater – Natural Gas

AstralPool HX Series – Pool & Spa Gas Heater

Extend Your Swimming Season – Affordably

Gone are the days when pools were used only during the summer months and spas were seen as a costly luxury. With today’s energy-efficient gas heating technology, pools and spas can be enjoyed year-round — affordably and conveniently.

The AstralPool HX Series Gas Heater delivers fast, efficient, and cost-effective heating, turning your pool or spa into a relaxing retreat, even at short notice. Whether it's for family relaxation or entertaining guests, the HX Series provides the perfect heating solution.

Possible Heating Times to Raise Water by 20°C

• 1000 L ≈ 65 minutes
• 1500 L ≈ 78 minutes
• 2000 L ≈ 95 minutes
• 2500 L ≈ 110 minutes

Actual times depend on ambient temperature, wind, plumbing layout, heat loss, water condition, and other site factors.

Technical Specifications

• Model: HX120 / HX 120
• Fuel Type: Natural Gas
• Heat Output: ~24 kW
• Gas Input: ~110 MJ/h
• Gas Use: ≈ 2.6–3 m³ Natural Gas / h
• Efficiency: Up to 83%
• Flow Rate: 150–300 L/min
• Bypass: Required above 300 L/min
• Size: 820 mm H × 390 mm W × 515 mm D
• Weight: ~33 kg
• Gas Connection: 20 mm (½") BSP

Maintenance & Care

• Many HX heaters last for decades when properly maintained
• Maintain pH between 7.2 and 7.6
• Avoid poor water chemistry, including low pH and excessive sanitiser levels
• Avoid bromine tablets - these can lower pH and corrode copper heat exchanger
• Ensure correct water flow and adequate ventilation

Outstanding Efficiency

The HX Series achieves up to 83% thermal efficiency, helping you enjoy your pool or spa more often without worrying about rising energy costs.

Copper-Nickel Heat Exchanger

At the heart of the HX Series is the copper-nickel finned tube heat exchanger, built to:

• Handle high flow rates
• Improve thermal transfer
• Resist scale formation
• Reduce maintenance needs

This results in superior performance and durability, even in demanding conditions.

Advanced Electronic Controls

Featuring the Genus Touch Control Thermostat, the HX Series offers smart features for seamless operation:

• Actual & Desired Temperature Display
• Optional Remote Control (poolside or in-home)
• Self-Diagnostic Monitoring & Display
• Electronic Ignition (no continuous pilot light)
• Safety Lock-out Function

Built for Harsh Conditions

Proudly Australian-made, the HX Series is housed in a marine-grade, powder-coated steel cabinet, designed to withstand tough outdoor environments and deliver long-lasting performance.

Warranty & Support

All HX Series heaters are backed by a comprehensive warranty.
Register your product and learn more:

• Australia: www.astralpool.com.au/warranty

Specifications

* Heating time estimates depend on ambient conditions, pool/spa size, and initial water temperature.