Description
Fast, convenient heating for spas and smaller pools. Bring on-demand heating to a spa or smaller pool supplied by a suitable LPG gas system. The HX120 combines electronic ignition, digital temperature control and a compact cabinet designed and built in Australia.
This is the LPG version, part number 109721. Select the natural gas listing if your installation uses a mains natural gas supply.
Why choose this heater?
- Heat when you need it: A practical choice for owners who prefer to warm their spa ahead of a planned soak or add heating to a correctly sized small pool.
- Easy temperature adjustment: Electronic touch controls display the actual water temperature and your selected setting.
- Automatic ignition: Electronic start-up removes the need for a continuously burning pilot light.
- Efficient heat transfer: The finned-tube heat exchanger transfers heat from the gas burner into the circulating water. AstralPool quotes up to 83% efficiency for the HX range.
- Outdoor-ready cabinet: A powder-coated cabinet protects the heater, while the standard balanced flue suits outdoor installation.
- Helpful diagnostics: The display reports operating status and fault information to assist with servicing.
Technical specifications
| Brand / model | AstralPool HX120 |
|---|---|
| Manufacturer part number | 109721 |
| Gas type | LPG |
| Application | Spa and appropriately sized swimming pool heating |
| Standard installation | Outdoor; indoor installation requires a separate approved conversion and flue system |
| Temperature control | Electronic thermostat with digital display |
| Ignition | Electronic |
| Water connections | 40 mm PVC glue-in connections |
| Water flow through heater | 150–450 L/min; external bypass required above 450 L/min |
| Electrical connection | 240 V supply; standard 10 A three-pin plug |
| Published dimensions (H × W × D) | Approximately 820 × 390 × 515 mm; allow additional installation clearances |
Choosing the right heater
Heating time depends on the water volume, starting temperature, desired temperature, weather and heat loss. A pool or spa cover helps retain heat between uses. For a replacement, compare the existing heater label and connection positions before ordering.
Installation and compatibility
Your licensed gas fitter should confirm the gas supply, pipe sizing, water flow, electrical connection and required clearances. Indoor installation needs the AstralPool HX120 draught hood kit (10134), an approved flue and suitable ventilation; these installation items are additional to the heater.
Keep water balanced within the limits in the supplied manual, including a maximum salinity of 4,000 ppm. Installation and commissioning must follow the instructions supplied with the actual unit.
Contact Parts for Pools with your existing model, gas type and pool or spa size if you need help selecting a replacement.