Skip to content

Call us now to book 1300 422 566

Vulcan, Aquamax, Rheem, Thermann, Rinnai, Hydro-therm; Electic, Gas or Heat Pump Hot water system installations

Help, I have no hot water....what type of system do I get and how much will it cost!

When a hot water system fails it tends to go suddenly giving you little time to make a decision about a replacement hot water system.  It's best to plan ahead so you are ready when this occurs.  We've compiled a helpful guide to assist in narrowing down your replacement options based on members of the household, energy type and efficiency rating.

What type of system?


  • Electric storage (holding tank) is the most common to be found in Australian households as they are the cheapest to install. The con is they are not always the cheapest to run but you can use an off-peak tariff to assist in running costs.
  • Electric systems do not require an energy rating star but are required to meet a Minimum Energy Performance (MEP) set by the Government.
  • Installation is quick with 2-3 hours being needed to drain, remove and replace the previous electric unit.
  • Electric hot water systems can go inside or outside.
  • For off-peak running a 1-2 person household needs 125L, 2-3 person 160L: 3-5 person 250L and 5 or more 315-400L unit
  • Supply and installation costs range from $1180-1900 dependent on relocation and unit size.
  • This is a highly versatile, quick, and cost-effective solution for many households.


  • Natural Gas is a cheaper resource than electricity with bottled gas still economical however expect to pay more than if you had an NG connection.  A dual regulator is recommended for a 2 gas tank installation to ensure you don't run out of gas and therefore hot water.
  • Because the cost of gas doesn't change day vs night, the hot water system heats as needed and a storage unit doesn't run out if all hot water is used during the daylight hours, unlike electric off-peak.
  • Installation is quick with 2-3 hours being needed for like replacement.
  • Industry run energy rating star system for comparison of models.
  • Gas systems must be vented and therefore installation is restricted to either inside with a flue or to outside and within a set distance of openings such as windows and doors.
  • A pilot light uses a small amount of gas however if there is a blackout you can still lose hot water as there is an electric start to the pilot light.
  • Sizing for demand is similar to electric storage systems with the addition of an instantaneous choice, as the name suggests delivering hot water on demand.
  • Prices range between $1020-$1900 dependant on system size, storage or continuous and location requirements.
  • A highly cost-effective unit with added energy efficiency over an electric system.

Heat Pump

  • Because they use electricity to move hot or cold air from one place to another, rather than to generate it, heat pumps can deliver up to 10-15 times as much energy as they use. In fact, premium heat pumps can heat up a room at 600% efficiency, while gas heaters are around the 50% to 95% mark. (source:
  • They work on the same principle as reverse-cycle air conditioners, by extracting heat from the air using a refrigerant gas that is then pressurised in a compressor. The pressurised refrigerant transfers the heat to the water in the storage tank (like a heat exchanger).
  • Heat-pump water heaters are therefore generally better suited to warmer climates and are not well suited to cool climates – especially where frosts occur regularly. In cooler climates, the compressor will run for longer periods, which can result in greater energy consumption and a shorter life expectancy for the pump.
  • A heat-pump water heater might be worth considering if a solar hot water system is not suitable for your household. For example when:
    • there is a lack of roof space for solar panels
    • your house is oriented poorly for solar panels
    • electricity is your main fuel choice.
  • Cost for units depends on the STCs that are available from the Government, heat pumps, for example, claim the STCs for you, therefore, offer a price less the STCs and can start at $1495 plus installation.  Without STCs claimed upfront expect to pay up to $4000 with a claim submitted to obtain a refund for STCs dependent on unit rating.
  • 260L tank provides hot water for 3-6 people
  • Installation for heat pumps costs between $500-700 for plumber plus electrical connection.  
  • Higher upfront costs however energy efficiency results in lower running costs in comparison to electric and gas units.


  • A solar hot water system uses the sun's energy to heat water and consists of:
    • solar collectors (or panels) – roof-mounted solar collectors absorb sunlight to heat the water
    • a water storage tank – can be located either on the roof directly above the collectors or on the ground like a conventional hot water system
    • a gas or electric booster – heats the water when necessary, so that you never run out of hot water on cold or cloudy days or days where you use lots of hot water.
  • Considerations include:

    • your roof area and orientation
    • your hot water usage
    • the performance of the system
    • the type and cost of the system
    • the type of auxiliary heating used (gas boosted or electric boosted)
    • the installation costs and requirements
    • if there are government incentives available to you.
  • Similar to the heat pump system, higher upfront costs can lead to long term savings.
  • Prices are highly diverse and a quote is required based on site conditions.
  • STCs are available for based on how many STCs the unit selectred attracts. has a calculator that can be used to determine level of STCs available to claim.

We can obtain any brand of hot water system that you would prefer.  Brands come with a 6 - 10 year warranty with 1 year part and labor.  All of our workmanship is guaranteed for 1 year from the installation date.

Call us for a quote today on 1300 422 566 or complete our contact us form.