Quick Installations, Repairs and Replacements
Electric hot water heaters
Electric hot water systems offer a cost-effective, dependable option for households, ensuring a steady flow of hot water. Noosa Hot Water provides straightforward, efficient electric hot water installation and service with dependable results.
Electric hot water systems
Electric hot water units are still the predominant choice for Australian homes and have been produced locally for more than a century. While the basic technology remains familiar, contemporary models use better materials and thicker, higher-density insulation around their storage cylinders. That improved insulation helps the cylinder hold heat longer, cutting heat loss and boosting efficiency compared with units made before 2000.
These systems heat water similarly to a kettle via an immersed element and are sold in three main power ratings for the Queensland market: 1.8kW, 2.4kW and 3.6kW (with some 4.8kW models available in limited areas due to higher supply requirements). The same ratings apply across major manufacturers such as Rheem, Dux, Vulcan, AquaMAX and Rinnai.
Bear in mind that changing element wattage doesn’t alter the overall energy rating of the cylinder. For example, a 1.8kW element uses half the power of a 3.6kW element but will take roughly twice as long to heat an equivalent volume of water to the same temperature.
Most electric hot water systems are built with mild steel tanks coated internally with vitreous enamel and safeguarded by a sacrificial anode; stainless steel tanks are offered as an alternative, while the older copper-style heaters are no longer produced.
Noosa Hot Water supplies and installs dependable electric hot water systems for every household requirement, and our Noosa plumber team handles installation, repairs and gas and electric advice.
Flexible payment plans available now. Don’t wait to get your hot water system sorted.
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An electric hot water system
An electric hot water system can make up roughly a third of your power bill if you don’t have PV solar exporting to the grid. On tariff 11, which supplies electricity at the standard rate around the clock for general power and lighting, running costs tend to be higher. If your heater is on tariff 33 it will typically run for about 18 hours a day, usually pausing between 6–9am and 6–9pm. Tariff 31, the most economical option, supplies electricity during off-peak hours, generally from about 9pm to 6am.
It’s worth noting that tariff 31 is usually unsuitable for cylinders smaller than 250 litres when used by two or more people.
Electric hot water units come in many storage sizes, from compact 25-litre models for a kitchen or single basin up to 400-litre tanks for larger homes. The following is a general sizing guide for tanks and household use (actual needs will vary by hot water usage):
50L & 80L: Best for 1–2 people in a small unit. Only suitable on tariff 11, not appropriate for off-peak tariffs.
125L: Suits 2–3 people in a unit or small townhouse when on tariff 33.
160L: Suits 2–4 people in a unit or small townhouse when on tariff 33.
250L: Suitable for 2–4 people on tariff 31 in most three-bedroom homes, and up to 6 people on tariff 33.
315L: Good for 3–5 people on tariff 31, or up to 7 people on tariff 33.
400L: Ideal for 4–7 people on tariff 31, up to 9 people on tariff 33, and up to 12 people on tariff 11.
Noosa Hot Water can recommend the right hot water systems, tariff arrangements and installation or repair options so you get reliable hot water while keeping your energy costs under control. Contact your local Noosa plumber for expert advice on gas and electric systems.
Rheem
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Rheem is one of the most recognised names in hot water, renowned worldwide for quality and supported by one of the industry’s largest advertising campaigns. In Australia, Rheem produces an extensive selection of electric hot water systems: mild steel vitreous enamel (VE) tanks are manufactured in Sydney and stainless steel models are produced in Melbourne at the former AquaMAX facility. Under the Rheem umbrella you’ll also find well-known domestic hot water brands such as AquaMAX, Vulcan and Solahart. Warranty periods vary from 5 to 12 years depending on tank size and construction; to maintain warranty eligibility and prolong the life of your hot water system, servicing is required at least every five years. Servicing should include replacement of the sacrificial anode on vitreous enamel models, and it’s advisable to replace the pressure and temperature relief valve while the unit is serviced. At Noosa Hot Water we recommend Rheem for its proven reliability, wide product range and the peace of mind that comes with one of the most trusted names in hot water—ideal when you need a Noosa plumber for installation or repairs of gas and electric systems.
AquaMAX
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The AquaMAX brand dates back to 1988 and remained a family-run business until Rheem acquired the company in 2009; by then AquaMAX had already sold in excess of 500,000 electric hot water systems.
AquaMAX has long been recognised within the industry for reliable quality, particularly for its stainless steel hot water products.
Their stainless steel models continue to be manufactured in Victoria, while the mild steel VE electric hot water range is produced at Rheem’s Sydney facility.
AquaMAX hot water cylinders carry warranties of between seven and ten years, with shorter warranty periods generally applying to the smaller capacity units.
A service—especially replacing the sacrificial anode—should be completed before five years to help extend the life of the tank; Noosa Hot Water can assist with installation and repairs of gas and electric systems.
Vulcan
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Vulcan is a well-regarded hot water brand produced by Rheem. Positioned as Rheem’s budget-conscious line, Vulcan delivers reliable performance without a high price tag. Vulcan electric hot water systems use mild steel cylinders with vitreous enamel lining, built to provide consistent service in Australian homes. Warranty: 7 years for the 50L electric storage model, and 10 years for tanks from 80L up to 400L. To extend the life of the unit, replace the sacrificial anode between years 4 and 5 — this routine maintenance helps prevent corrosion and preserves cylinder integrity. At Noosa Hot Water, we advise Vulcan hot water systems as an economical option, supported by Rheem’s manufacturing reliability and available installation and repairs from a local Noosa plumber specialising in hot water systems, gas and electric units.
Rinnai
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Rinnai has long been regarded as a frontrunner in gas hot water, and until recently their electric models were either imported from China or built by Dux in NSW. Rinnai now operates its own manufacturing facility in Victoria, where the Hotflo electric hot water systems are produced locally.
Their electric lineup ranges from space-saving 25‑litre units—perfect for kitchenettes or compact areas—to substantial 400‑litre tanks suited to larger homes. Warranty: 7 years on 25L and 50L models, and 10 years on the bigger capacity systems. Note: to keep the warranty valid, a service is required every five years (or sooner). At Noosa Hot Water, our Noosa plumbers supply and install Rinnai systems because of their dependable performance, good energy efficiency, and the reassurance of Australian-made manufacturing.
Dux
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Dux has been a respected name in Australian hot water for over a century. Although ownership is no longer Australian, the company still makes dependable systems suited to local conditions. Dux electric hot water systems use mild steel cylinders with a vitreous enamel lining, providing lasting performance for homes of any size. Most models are produced in Moss Vale, NSW, and tank capacities span from compact 25 litre units up to 400 litre systems. Warranty periods differ by capacity:
7 years on the cylinders of 25L and 50L models 10 years on all larger capacities At Noosa Hot Water, our Noosa plumbers endorse Dux hot water systems for their consistent reliability. We maintain a broad stock selection so you can have the appropriate hot water system installed or repaired promptly, whether gas and electric models are required.
Thermann
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Thermann is sold exclusively through the Reece Plumbing Supplies network, with its electric hot water units manufactured by Dux. Built from mild steel and lined internally with vitreous enamel, Thermann tanks include a sacrificial anode to guard against corrosion. That anode should be replaced within five years to help the hot water system reach its expected service life. Thermann electric models carry the same warranty terms as the Dux Proflo range: 7 years for 25L and 50L units and 10 years for larger capacities. At Noosa Hot Water, we hold Thermann water heaters in high regard for their dependable performance and solid build.
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