Hot Water Systems in Duncan
The 5223 postcode, covering Duncan, Brownlow, D’estrees Bay, Stun’sail Boom, Stun'sail Boom, Bay Of Shoals, Birchmore, Brownlow Ki, Cape Borda, Cassini, Cygnet River, De Mole River, D'estrees Bay, Emu Bay, Flinders Chase, Gosse, Haines, Harriet River, Karatta, Kingscote, Kohinoor, Macgillivray, Menzies, Middle River, Nepean Bay, Newland, North Cape, Seal Bay, Seddon, Stokes Bay, Vivonne Bay, Western River and Wisanger and surrounding areas, is home to around 2,041 households. With many households already generating their own clean solar power, many are now looking at how they can make their entire home energy system more efficient, with hot water heating often the logical next step.
With hot water roughly accounting for a quarter of the average home's energy use, switching to an energy-efficient hot water system is one of the biggest opportunities for savings. Across Duncan and the 5223 area, 139 homeowners have already switched from older electric storage and gas hot water systems to solar hot water or air-source heat pump systems that draw on clean, renewable power while also claiming the hot water rebates to reduce their hot water heater system cost. These highly-efficient systems not only help cut energy bills but also reduce carbon emissions and improve overall energy independence.
With Duncan's climate delivering an average of 4.6 kWh/m² per day, conditions are ideal for hot water systems and hybrid heat pump systems that harness both sunlight and ambient air temperature to heat water efficiently all year round. When paired with existing rooftop solar power or solar batteries, the result is hot water that costs far less to run and is powered by clean, self-generated energy.
Hot Water Ranking
Postcode 5223
119th
State Wide
1243rd
Australia Wide
Hot Water Installation Duncan
Estimated daily energy to heat household water, comparing a resistive electric element with a high-efficiency heat pump. Demand shifts month-to-month using local climate patterns.
Energy Efficient Hot Water & Solar Power Duncan
* Data from the Bureau of Meteorology. Closest station: N/A.
Solar Powered Hot WaterDuncan
Illustrates how a typical 6.6 kW rooftop solar system can offset the daytime energy demand of a COP 5 heat pump hot water unit.
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Heat Pump Hot Water Systems for Duncan
Compare heat pump hot water systems suitable for Duncan's climate. These energy-efficient systems are designed to work in local temperature conditions and can significantly reduce your hot water energy costs.
Community Hot Water Statistics - Duncan, 5223
Hot Water Demographics - Duncan
Based on the Australian Bureau of Statistics 2021 Census (ABS), Duncan has around 2,041 private dwellings, home to approximately 3,193 people. With an average household size of 2.2 people, and around 50 litres of hot water used per person each day in Australia, Duncan households use approximately 110 litres of hot water daily, equating to a massive 0.2 million litres of hot water used across the suburb every single day.
Other census insights reinforce Duncan's suitability for energy-saving improvements like energy-efficient or solar-powered hot water. The Duncan community is home to 256 couple families with children and 50 one-parent families, meaning a large proportion of households face substantial hot water demand. With 413 homes owned with a mortgage and 584 owned outright, many residents also have the homeownership and growing equity that make switching to efficient hot water systems a practical way to lower expenses.
Duncan is converting hot water demand to efficient systems faster than many peers, with 6.8% of dwellings already upgraded.
Hot water systems in Duncan
Across Duncan and the wider 5223 area, more locals are rethinking how they heat their water. With power prices biting and many households moving away from bottled gas, upgrading to an energy efficient hot water system is becoming the obvious next step. In a postcode where most dwellings are separate houses and the average household size is around 2.2 people, a well‑sized heat pump hot water system, solar hot water system or modern electric hot water system can comfortably cover daily needs without wasting energy.
Duncan is well placed for efficient hot water upgrades. The local climate records show mean daily solar exposure of about 16.5 MJ/m², which is roughly 4.6 kWh/m² of sunlight per day over the year. That strong solar resource supports both heat pump hot water and solar hot water performance, especially when paired with rooftop solar. With more than 1,400 occupied private dwellings and a large share of homes owned outright or with a mortgage, many owner‑occupiers here are in a good position to invest in long‑term savings from a modern hot water installation.
Households in Duncan typically spend a big chunk of their electricity on hot water, especially older electric or gas systems. Swapping to the most efficient hot water system you can afford can trim a large slice off your bills. For a typical 2–3 person home, a quality heat pump hot water installation or solar hot water heating system can cover most or all of your hot water needs, particularly if you already have solar panels. Brands like Rheem heat pump hot water, Sanden heat pump and Rinnai solar hot water are popular choices for reliable performance, while options such as Chromagen solar hot water suit homes looking for a robust solar hot water tank replacement. Many locals also compare heat pump vs solar hot water to see what best fits their roof space, budget and usage patterns.
Average annual bill savings in Duncan can look like this: • Upgrading old electric to a heat pump hot water system: about $350–$700 per year • Switching gas to a heat pump hot water system: about $300–$600 per year • Switching gas to a solar hot water system: about $250–$550 per year • Replacing old electric with a modern electric hot water installation timed to run on solar: about $200–$450 per year
In total, around 139 efficient hot water systems have already been installed in the 5223 postcode, including both heat pump and solar hot water installation projects. Installations really took off in the mid‑2000s, with peak years like 2004 and 2009 seeing strong numbers, and there has been renewed interest recently with fresh installs recorded in 2019, 2022 and 2024. This steady pattern of hot water installation and hot water repair activity shows growing local interest in electrification, lower running costs and more sustainable hot water SA‑wide.
Hot Water Rebates, Tariffs & Savings
Homeowners in Duncan are increasingly replacing old gas or resistive electric units with efficient options such as a heat pump hot water system, high‑efficiency electric hot water system or solar hot water system. Australian Federal Government incentives, including Small‑scale Technology Certificates (STCs), can reduce the upfront solar hot water price / cost or heat pump hot water price / cost. On top of this, South Australian schemes can offer a heat pump hot water rebate or solar hot water rebate, and in some cases an electric hot water system rebate when moving away from gas hot water.
For many Duncan households, these hot water rebate SA programs can effectively cut the system cost by 20–40%, bringing premium options like Sanden heat pump systems or rheem solar hot water into reach. When you combine rebates with smart tariffs, timers or solar‑diversion controls, it is common to save hundreds of dollars per year on bills and shorten the payback period to just a few years. Choosing an energy efficient hot water system also makes it easier to go all‑electric and take full advantage of your rooftop solar.
If you are weighing up solar hot water vs electric hot water, or comparing the best heat pump hot water system with other options, it helps to look beyond the upfront hot water system price / cost and focus on lifetime savings. The best hot water system Australia‑wide for your home will depend on how many people live there, when you use hot water, whether you have solar, and whether you want to future‑proof your home for all‑electric living.
If your current unit is older, unreliable or running on gas, now is a smart time to check whether your Duncan home is ready for a hot water upgrade. Talk with experienced local hot water installers like us—specialists in heat pump hot water installation, solar hot water repair and efficient electric hot water vs gas hot water changeovers. With Duncan’s strong solar resource and growing interest in sustainability, an energy efficient hot water system can help cut your bills, reduce emissions and protect you from rising energy costs. Reach out to our trusted local team for personalised advice and a tailored quote for hot water SA homes.