everything you need to know about gas hot water systems
If you're tired of lukewarm showers or running out of hot water just when you need it most, it might be time to consider
a gas hot water system. At Pryceless Plumbing and Gas, we help Perth homeowners enjoy reliable, energy efficient hot water every day without the shock of massive power bills.
Here’s a quick guide to gas hot water systems: what they are, how they work, and why they could be the perfect fit for your home.
What is a Gas Hot Water System?
A gas hot water system uses natural gas (or LPG) to heat water, either instantaneously or through a storage tank. It's one of the most popular options in Perth due to its efficiency, quick heat-up time, and consistent performance - especially during the cooler months.
Instantaneous Gas Hot Water Systems: How They Work
Also known as tankless or on-demand systems, continuous flow hot water systems heat water only when you turn on the tap. There's no tank involved and instead, a powerful gas burner quickly heats water as it flows through a compact heat exchanger.
- When you turn on a hot tap, a flow sensor activates the gas burner.
- Water is instantly heated as it moves through copper pipes or a heat exchanger.
- The system shuts off when you turn the tap off, using no energy in standby mode.
Instantaneous Gas Hot Water Systems: Key Benefits
Instantaneous gas hot water systems are highly energy-efficient, as they only heat water when needed and eliminate standby heat loss due to the absence of a storage tank. Their compact, wall-mounted design makes them ideal for homes with limited space. These systems provide unlimited hot water, so you'll never run out as long as there's a gas and water supply. With proper maintenance, they also tend to have a longer lifespan than traditional storage systems.
- Energy-efficient – No standby heat loss since there’s no storage tank.
- Compact design – Wall-mounted units are perfect for homes with limited space.
- Unlimited hot water – You’ll never run out, as long as there’s gas and water supply.
- Longer lifespan – Typically lasts longer than storage systems with proper maintenance.
Instantaneous Gas Hot Water Systems: Things to Consider
While continuous flow systems offer many benefits, they do come with a few considerations. The only major flaw these systems have is if there is a power outage, there is no hot water. These systems are best suited for small to medium-sized households or homes with moderate hot water usage. Our tradesman can discuss what size unit would best suit the size of your house as instantaneous systems are sized by a flow rate per minute (12L, 16L,20L etc. per minute). Converting to an instantaneous hot water system typically requires upgrading the gas supply line, as a larger gas pipe must be installed from the submeter to the unit to ensure proper performance.
storage gas hot water systems:
Storage Gas Hot Water Systems: How They Work
Gas storage hot water systems operate by using a gas burner located beneath the tank to heat the water. Once heated, the water is stored in the insulated tank, ready for use whenever it's needed. A built-in thermostat maintains a consistent temperature by monitoring the water and activating the burner as required. As hot water is drawn from the tank, cold water flows in to replace it, prompting the system to reheat and maintain the set temperature.
- Pre-Heated Water Storage: Heats and stores a set amount of hot water in an insulated tank, ready for immediate use.
- Constant Temperature: Maintains water temperature in the tank, ensuring hot water is always available. The temperature can be adjusted to suit preferences.
- Multiple Options: Available in various sizes (typically 90L to 300L) to suit different household needs.
storage Gas Hot Water Systems: Key Benefits
Gas storage hot water systems provide instant hot water at the tap, with pre-heated water always available when you need it. With larger capacity tanks available, they accommodate larger families without a drop in performance. Many systems, especially those connected to mains pressure, also deliver strong and consistent water pressure throughout the home.
storage Gas Hot Water Systems: Things to Consider
Despite their convenience, gas storage systems do have some drawbacks. They use gas continuously to maintain the tank’s temperature, which can lead to higher energy use even when hot water isn’t being used. Regular servicing of gas systems is essential to ensure they are operating safely and efficiently, and to identify any worn or faulty valves that may require replacement. The tanks themselves are bulkier than instant systems, requiring more space for installation. Additionally, while they can deliver a lot of hot water quickly, it is possible to run out during periods of high demand—though they typically reheat faster than electric alternatives.
- Uses gas continuously to maintain stored temperature, even when not in use.
- Larger units take up more physical space.
- May run out of hot water during peak use.
professional installation and advice
The PPG Guarantee
Our expert plumbers handle the entire process. From helping you choose the right system, to installation, plumbing, and testing. We also offer maintenance and repairs for existing heat pump systems.
All work is:
- ✅ Carried out by licensed professionals
- ✅ Fully compliant with WA regulations
- ✅ Covered by warranty and manufacturer support
- ✅ Backed by honest, upfront pricing
ready to have a chat?
Ready to make the switch to a more sustainable hot water system? Or not sure if a heat pump is right for your home?
Contact Pryceless Plumbing and Gas today for expert advice, a free quote, or to book your installation.