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AUSTRALIA's POOL & SPA HEATERS
Mastertemp Gas Spa Heaters

Mastertemp Gas Spa Heaters

by Pentiar
$3,900.00
$3,900.00
$3,900.00
$3,900.00
$3,900.00
$3,900.00
$3,900.00
$3,900.00

Mastertemp Gas Spa Heaters – Compact to High-Performance Heating

The Mastertemp 125 gas heater is purpose-built for spas, plunge pools, and compact swimming areas. With 125 MJ/hr of heating power in a small and efficient unit, it provides rapid water heating without the bulk or cost of commercial-grade systems.

For those looking to minimise heat-up time or heat larger plunge pools or swim-spas, HeaterFix also offers the full Mastertemp range (200, 300, and 400) as optional upgrades—delivering the same smart control, compact form, and rugged construction, scaled to your needs.

🌟 Features & Benefits

  • Ideal for Spa & Small Pool Applications
    The Mastertemp 125 is the go-to heater for spas up to 20,000L, offering fast heat-up, simple controls, and energy savings.
  • Optional High-Capacity Models (200–400 MJ/hr)
    Choose a larger heater to dramatically reduce heat-up time or to service bigger plunge pools and combo systems.
  • Smart Digital Display
    All models feature an intuitive control interface with temperature setting, status diagnostics, and automation compatibility.
  • Quiet Operation
    Designed to run efficiently and silently so you can enjoy your spa without disruption.
  • Compact & Durable Design
    Weather-resistant composite housing and a compact footprint make Mastertemp heaters easy to install and built to last.

📊 Specifications – Mastertemp Spa Heaters

Model Gas Input (MJ/hr) Ideal Use Gas Connection Water Connection
125 125 MJ/hr Spas / plunge pools (up to ~20,000L) 20mm 40mm
200 200 MJ/hr Medium-sized spas / fast recovery 20mm 40mm
300 300 MJ/hr Larger plunge pools or combo setups 20mm 40mm
400 400 MJ/hr Maximum speed / large plunge-spas 25mm 40mm

🧠 Why Choose a Larger Model?

You may benefit from a larger heater if:

  • You want faster heat-up times
  • Your spa or plunge pool is > 20,000 litres
  • You experience cold weather or wind exposure
  • You operate a swim-spa combo or multiple heating zones

🔧 Nationwide Sales & Support

HeaterFix technicians install Mastertemp spa heaters Australia-wide and provide expert advice for sizing, setup, and servicing.

📍 WA | NSW | VIC | QLD | SA | NT | ACT | TAS

📞 Call 0451 658 880 or click the Get A Quote button. 💬 Request a Spa Heating Quote

Why Buy from HeaterFix?
  1. We are 100% Australian owned & operated.
  2. We are fully qualified with gas license - GF9918.
  3. We are Warranty agents for many pool heater manufacturers.
  4. We have been installing pool & spa heaters since 1995 (30 years)
  5. We are Australia's number 1 supplier of pool and spa heaters, parts & accessories.
  6. Our 300sq mt warehouse stores over 10 brands of gas heater and pool heat pumps with over 3000 new heater parts & over 500 used parts.
  7. We offer fast shipping to you door, Australia wide.
  8. We provided support like no other because we are the people who install, service and repair pool & spa heaters.

If your reading this then we can guarantee you, you've come to the right place.

What Our Clients Say!

5 STARS

HeaterFix gave us great service in replacing our Hurlcon HX120 spa heater. We didn’t expect to see it until November, but it arrived in a week and is installed. Well done Jason.

B Wendt/Glen Waverley VIC

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5 STARS

He had our Pool Heater installed a few weeks ago, and the advice on the best location and positioning was more than just fit and leave it was working within the space and surroundings to suit our needs. Price is important, but you always remember the quality. Thank You.

Peter L/Yokine WA

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5 STARS

Fast efficient service. It’s great to deal with a company that provides such great service, 5 stars all the way.

D Cartwright/Surfers Paradise QLD

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5 STARS

This is one professional Company. I had an issue with my gas spa heater. I spoke with Jason who guided me through a couple of self checks and finally isolate the problem. His advise and knowledge was outstanding. The parts were promptly sent, installed and operation is perfect. Highly recommended.

M Jones/Forster NSW

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