If you’re due to upgrade your hot water system, you’ll see that water heating technology has come a long way since the humble electric system dominated Aussie households. Today, Sydney homeowners have a choice of electric, gas, solar and heat pump hot water systems. So which one is right for your home? From upfront costs to energy efficiency, and ongoing maintenance requirements, there’s a lot to consider. It’s easy to feel overwhelmed!
After more than two decades installing and servicing hot water systems in Sydney homes, expert plumber Joe Rantino from Gladesville Plumbing understands the pros and cons of each system. Read his key insights in this handy hot water comparison guide.
Solar Hot Water
With Sydney experiencing around 200 days of sunshine a year, solar hot water systems are a great option if you’re keen to significantly reduce your energy bills and increase your home’s sustainability.
Pros of Solar Hot Water
- Heats water with free energy from the sun
- Very low running costs slash household energy bills
- Reduces household carbon footprint
- Can last up to 20 years with proper maintenance
- May attract government rebates
Cons of Solar Hot Water
- High upfront costs
- Installation is typically more complex than electric or gas systems
- Requires unshaded roof space (north-facing for maximum solar exposure)
- Higher maintenance and repair costs than electric
Joe’s Expert Plumber Tip: “For customers with the roof space and upfront budget, I recommend solar hot water systems. They’re really efficient, and when the sun is shining, they heat your household water for free.”
Heat Pump Hot Water
Heat pump hot water systems use energy-efficient technology that draws heat from the surrounding air to heat water in a storage tank. This makes them ideal in warmer climates. In Sydney’s cooler winter months, a boost function may be required to meet demand.
Pros of Heat Pump Hot Water
- Can reduce water heating costs by up to 75%
- More environmentally sustainable than electric or gas hot water
- Provides even better cost-savings when paired with PV solar panels
- Longer lifespan than electric systems if properly maintained
- May attract government rebates
Cons of Heat Pump Hot Water
- Higher upfront costs
- Must be installed in an outdoor space with adequate airflow and ventilation
- Higher maintenance and repair costs than electric
- Requires a gas or electric booster element on colder days
- Units make a low hum which can be an issue
Joe’s Expert Plumber Tip: “A large heat pump hot water system can work well for bigger families, especially if the home already has PV solar panels installed. Choosing a reputable brand and professional installation is critical though. We’re finding customers have had poorly manufactured imported heat pumps incorrectly installed in basements and garages, and they need to be replaced a lot sooner than expected.”
Electric Hot Water
Many Sydney homes were built for mains pressure electric water heaters, so when the old system dies unexpectedly, replacing it with a new electric system is the quickest (and usually cheapest) way to restore hot water. However, reliance on fossil fuels for water heating does come with a bigger carbon footprint and significantly higher energy bills.
Pros of Electric Hot Water
- Lowest upfront costs for those on a tight budget
- Fast, straightforward installation
- More economical to run using off-peak tariffs and PV solar panels
- A more suitable choice for apartments and properties that lack space for solar or heat pump installation
Cons of Electric Hot Water
- Highest running costs for households without PV solar or access to off-peak electricity
- Slower reheating times can leave big households without enough hot water
- Larger carbon footprint when run on non-renewable grid electricity
- Shorter lifespan than solar and heat pump hot water systems
Joe’s Expert Plumber Tip: “A lot of Sydney properties were designed with electric in mind, so if a quick system replacement with an affordable initial outlay is required, electric water heaters can be the best bet.”
Gas Hot Water
If your property has an existing gas connection, you may be considering installing a gas hot water system. For families in Gladesville and surrounding suburbs, a continuous flow gas system provides a convenient supply of never-ending hot water – even after the teenagers have showered!
Pros of Gas Hot Water
- Natural gas is typically cheaper than grid electricity, making gas systems cheaper to run than electric
- Continuous flow systems heat water on demand, making them great for households that require an endless supply of hot water
Cons of Gas Hot Water
- Continuous flow systems can experience pressure and temperature drops if not correctly sized for household water usage
- Gas storage tank systems heat and store water even when not in use
- Tank systems can run out of hot water and will require a booster to reheat
- Gas is a fossil fuel, so rising running costs are expected
Joe’s Expert Plumber Tip: “For large families with an existing gas connection, continuous flow systems are often the most convenient. You turn that tap on, and you’re consistently getting hot water until you turn the tap off.”
Expert Advice For Choosing a Hot Water System
The best hot water system for one Sydney home may not be right for another, so it’s important to consider your household’s unique hot water needs. These include:
- Household size & hot water usage patterns
- Space constraints & available energy sources (e.g. gas, PV solar)
- Upfront budget & desired energy savings
If you’re unsure, consulting an experienced Sydney plumber can help you clarify your hot water needs and select the most suitable system to meet them.
Don’t leave this important decision to guesswork. Just call Joe and the Gladesville Plumbing team for trusted advice, quality workmanship and friendly service. Get in touch.