With so many hot water options available — electric, gas, solar, and heat pump — choosing the right system can be overwhelming. This comprehensive guide compares all four types on cost, efficiency, environmental impact, and suitability for different household sizes.
Choosing the right hot water system is one of the most important decisions you'll make for your home. Let's break down your four main options. First, traditional electric storage — these are the cheapest to buy and install, typically costing around $800 to $1,500 installed. But they're the most expensive to run because they use a resistive element to heat water. They're being phased out in new builds in many states. Second, gas storage and instantaneous — gas hot water is more efficient than electric. Storage systems heat a tank of water and keep it hot, while instantaneous systems heat water on demand as it flows through. Gas instantaneous systems are very popular because they never run out of hot water and they're reasonably efficient. Installed cost is around $1,200 to $2,500. Third, heat pump — these are the efficiency champions. They extract heat from the air to warm your water, using about one-third the electricity of a standard electric system. Government rebates and STCs can bring the effective cost down significantly. Ideal for households with good sun exposure and moderate to high hot water usage. Fourth, solar — panels on your roof capture the sun's energy to heat water, with an electric or gas booster for cloudy days. The highest upfront cost at $3,000 to $7,000, but the lowest running costs. Government rebates help offset the initial investment. For a family of four in Brisbane, I'd typically recommend a heat pump as the best all-round option considering cost, efficiency, and practicality. But every home is different, so we always do a free assessment before recommending a system.
