Thermann 4 Star 135L Natural Gas Hot Water System

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Thermann 4 Star 135L Natural Gas Hot Water System


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Thermann 4 Star Natural Gas Hot Water System (135L)

The Thermann 4 Star Natural Gas Hot Water System is designed to cater to the hot water needs of families with 3 to 5 members. It features an adjustable thermostat for enhanced safety and efficiency, allowing you to have control over your operating costs and system performance. With a 4-star energy efficiency rating, this hot water system ensures a reliable supply of hot water for your household.

Key Features:

  • Impressive 4 Star Efficiency Rating.
  • Provides full mains pressure hot water.
  • Compact design for easy replacement.
  • Includes a Pressure and Temperature Relief (PTR) Valve for safety.

How It Works:

  • Cold water enters the tank through a pipe at the bottom.
  • A gas burner located under the tank initiates the heating process.
  • Hot exhaust gases from the burner ascend alongside the tank, further heating the water to the desired temperature.
  • The hot water progressively rises to the top of the tank. When a tap inside your home is turned on, the hottest water exits from the top of the tank and flows to your location.
  • To ensure the water remains at the desired temperature, a thermostat constantly monitors the water temperature and controls the burner, turning it on or off as necessary.


  • Suitable for households with 1 to 2 bathrooms and 3 to 4 occupants.
  • Designed for external installation.
  • Utilizes Natural Gas as the fuel source.
  • Features a Vitreous Enamel tank material.
  • Boasts a 135-liter tank capacity.
  • Delivers 257 liters of hot water in the first hour.
  • Offers a 4-star energy efficiency rating.
  • Rapid hot water recovery rate: 122 liters per hour at a 45°C temperature rise.
  • Gas consumption: 29.5 MJ/h.
  • Various connection and pressure settings.

This natural gas hot water system provides a reliable source of hot water for medium-sized households, ensuring your family's hot water needs are met efficiently.

Warranty Information

Tank Warranty - Domestic: 7 Years 

Parts and Labour: 12 Months 

**Warranty Conditions apply

‍Delivery Information

All Hot Water Systems have Nationwide delivery and in the majority of cases shipping is free!

Please note that all sales need to be within a 50km radius of a town with a population over 30,000. If you are not within this area please phone for availability.

Special Note

Prices listed next to each heater* are for supply and install in the Brisbane, gold coast and Ipswich areas only. Supply & Install prices are for like for like installations. Tempering valve if required is an additional $185.00
Phone us now on 07 3733 3622 to get your new Rheem hot water system.

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