Hot Water Systems

Gas Hot Water Systems

With ongoing price rises for electricity,  gas hot water systems are becoming a popular choice for hot water installations.  So, if you have town gas this is a good option to consider, otherwise LPG is also available through a Gas retailer.

The advantages of gas hot water systems:

  • The running cost of hot water is lower.
  • They have lower greenhouse gas emissions.
  • They are more energy efficient, especially the new 4-star and 5-star rated models.
  • Gas supply does not fluctuate in price like electricity during the day.  Peak or off peak.   
  • Most models are available in natural gas and LPG versions.
  • Installation can be completed conveniently.

Gas heaters are either available in a storage unit or Continuous flow unit.


Gas Storage Hot Water Systems

Storage gas hot water systems use a gas burner located underneath the storage tank to heat the water.   Water is preheated and maintained at a designated temperature in the tank, so it is ready when needed.

They usually have a continuously burning pilot flame that ignites the main burner when it is needed. Heat is then transferred from the gas burner through the bottom of the cylinder.

Instantaneous Continuous Flow Gas Hot Water Units

Continuous flow gas hot water systems are a tankless gas hot water system that provides hot water on demand whenever you turn on the tap.  Therefore, helping you save energy, too.  Instantaneous (instant) gas hot water systems are also available in LPG and natural gas models.

  • You get hot water on demand.
  • Instantaneous gas hot water units are tankless, wall mounted and compact.
  • Save money using continuous flow gas water heaters. They only heat the water you need.

Electric Hot Water Systems

Electric storage hot water systems heat water with an element in the bottom of the unit and store it in an insulated tank ready for use.

You will have a lower up-front cost with electric units, compared to solar and Gas systems.  They are a reliable way to keep your water warm and a convenient replacement when your existing unit fails.  Some electric hot water systems can also be pre-set to do the majority of its heating during off-peak periods to help minimise your energy bill.

Themann Hot Water System

  • Rely on an electrical element to heat the water.
  • 7 or 10 Year warranty depending on unit choice
  • Includes a range of sizes suitable for connection to different tariffs
  • Some sizes available in both single and twin element
  • An electrically heated storage tank system is usually relatively cheap to buy and install, but is usually the most expensive to run.
  • A four-person household typically needs a 125–160L tank for a continuous system or 250–315L for off-peak.
  • Can be installed indoors or outdoors.
  • They range in price from about $300 to $1500 (not including installation).
  • Range from 50L – 400L

Solar Hot Water Systems

A split system for solar hot water consists of solar collector panels and a storage tank.

For the best efficiency, solar collectors are located on the roof structure, facing in a northerly direction.  The seperate tank which sits on the ground is usually located close to one of the makor hot water consumption areas such as a bathroom.

Split system solar hot water heaters use cool water which is pumped in a continuous cycle from the bottom of the tank and circulated through the solar collectors. Here it absorbs the heat extracted from the sun before being returned to the tank.

A split system consists of north facing roof mounted collector(s) and a separate tank on the ground, usually located close to one of the major hot water consumption areas such as the bathroom.

Hot Water Heat Pumps

Heat pump water heaters use over 60 per cent less electricity than a traditional electric water heater, reducing your household electricity bill and greenhouse gas emissions.

They can be easily installed to replace most traditional electric water heaters, without the need for a gas connection or solar panels on your roof.

How does a heat pump work?

Rather than using electricity to directly heat the water through an element, a heat pump water heater only uses electricity to operate a pump. This pump circulates a refrigerant that picks up the heat from the air.b It then transfers it to the water.

Heat pump water heaters generally perform most efficiently in warmer climates, therefore very suitable for the Brisbane area.

Your heat pump must be installed by a accredited plumber.

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