Gas Pool & Spa Heaters

AstralPool Gas Spa Heaters

HX 70, HX 120 - Super robust, simple spa heater design that’s proven over decades. 2 Year Warranty. 1 Year Labour. Made in Australia
Best for: smaller residential spas and fast heat-up with simple on/off control.
JX 130, JX 160 - Wall-mounted, very robust, strong performance for larger spas and smaller pools. 2 Year Warranty. 1 Year Labour. Made in Australia
Best for: higher heat demand, quicker warm-ups, and wall-mount installations.

Heat-up Times Chart (Raise Water by 10°C)

Use this as a quick guide to estimate how long each heater size may take to lift your pool or spa by 10°C based on water volume. Real-world results vary, but this is handy for comparing heater output and expected heat-up speed.

Heater	kW*	1,000 L	5,000 L	10,000 L	15,000 L	20,000 L	25,000 L	30,000 L	40,000 L	50,000 L	60,000 L	70,000 L	80,000 L	90,000 L	100,000 L
HX 70	16	45m	3h 45m	7h 15m	10h 45m	14h 30m	18h 15m	21h 45m	29h	36h 15m	43h 45m	50h 45m	58h	65h 30m	72h 45m
HX 120	24	30m	2h 15m	4h 30m	6h 45m	9h	11h 15m	13h 30m	17h 45m	22h 15m	26h 45m	31h 15m	35h 45m	40h 15m	44h 45m
JX 130	26	30m	2h 15m	4h 15m	6h 30m	8h 30m	10h 45m	12h 45m	17h	21h 15m	25h 30m	29h 45m	34h	38h 30m	42h 45m
JX 160	33	20m	1h 40m	3h 15m	4h 45m	6h 15m	8h	9h 30m	12h 45m	16h	19h 15m	22h 30m	25h 45m	29h	32h

Disclaimer: This chart is a general guide only. Actual heating times vary depending on ambient temperature, water circulation, heater efficiency, pool cover use, wind, and heat loss. Do not rely on these figures for design, installation, or operational decisions. *kW output ratings are a rough conversion.