Gas vs Electric Hot Water: Which Suits You?

A hot shower after a day at the beach, a busy morning with the family, or reliable amenities for tenants all depend on one thing: hot water that keeps up. When weighing up gas vs electric hot water, the right choice is rarely just about the unit price. Your household size, available services, energy use and property plans all matter.

For homes and businesses across Busselton and the South West, both options can be practical and reliable when properly selected and installed. The better system is the one that suits how much hot water you use, where your property is located and what it will cost to run over time.

Gas vs electric hot water: the main difference

Gas hot water systems heat water using natural gas or LPG. They are commonly available as storage systems, which keep a tank of hot water ready for use, or continuous-flow systems, which heat water as it passes through the unit.

Electric hot water systems use an electric element. Traditional electric storage systems heat and store water in a tank, often on a controlled tariff where available. Electric continuous-flow units are also available, although they can require significant electrical capacity. Heat pump systems are another electric option. They use electricity to extract warmth from the air and transfer it into the water, rather than heating the water directly.

Each type has a different balance of upfront cost, running cost, recovery time and installation requirements. A like-for-like replacement may be straightforward, but changing fuel types needs more planning.

When gas hot water makes sense

Gas is often a strong choice for larger households that use hot water at several outlets at once. A suitably sized continuous-flow gas system can provide hot water for consecutive showers, the kitchen and laundry without relying on a stored tank running low.

This can be particularly useful for homes with four or more occupants, holiday properties with changing guest numbers, or commercial premises with regular hot water demand. Continuous-flow units also take up less space than a large storage tank and only heat water when you turn on a tap.

Natural gas is not available everywhere in the South West, so some rural and regional properties rely on LPG bottles. LPG can still provide dependable hot water, but bottle size, delivery arrangements and fuel pricing need to be factored into the decision. If the property already has gas connected for cooking or heating, installing gas hot water may be more practical than starting from scratch.

Gas storage systems can suit households that prefer the familiarity of a tank and have enough outdoor space. They generally recover faster than standard electric storage units, but they still have a finite stored supply. Selecting the right tank capacity is essential, especially in homes with teenagers, multiple bathrooms or a large spa bath.

Things to consider before choosing gas

The purchase and installation cost of gas can be higher where new gas pipework, a meter upgrade or LPG connections are required. A continuous-flow unit also needs correct sizing for the number of outlets and the temperature of incoming water. An undersized system may struggle when two showers are running, while an oversized unit can add unnecessary cost.

Gas units need compliant ventilation, flueing and clearances. Installation and any gas alterations should always be completed by a licensed gas fitter. Regular servicing helps keep the system operating safely and efficiently, particularly on coastal properties where salt air can affect external equipment over time.

Where electric hot water can be the better fit

Electric storage hot water remains a practical option for many households. It is commonly installed, generally simple to replace where an existing electric tank is already in place, and does not require gas supply or flueing.

For smaller homes, units and properties with predictable hot water use, a correctly sized electric storage tank can offer dependable performance. If hot water is mostly used morning and evening, a tank can be sized and scheduled to suit the household's pattern.

Electric systems are also worth considering for properties that do not have natural gas access and do not want the ongoing logistics of LPG bottles. For a new build or major renovation, electricity may fit better with a broader plan to use solar power, battery storage or high-efficiency appliances.

Heat pump hot water systems deserve particular attention. While they use electricity, their operating costs can be much lower than conventional electric storage because they move heat rather than create it directly. They can work well in the South West climate, but they need appropriate outdoor space, good installation and consideration of noise, airflow and location.

The trade-offs with electric systems

A standard electric storage system may have a lower upfront price, but direct electric heating can cost more to run than gas or a heat pump, depending on electricity tariffs and usage. It also has a slower recovery time. Once the tank is depleted, occupants may need to wait for water to reheat.

This does not automatically rule out electric storage. A larger tank, sensible hot water habits and a suitable tariff can make it a sound choice. It is simply important to match tank capacity to actual demand, not just choose the same size as the old unit without checking whether it has been meeting the household's needs.

Electric continuous-flow systems avoid tank storage, but they can place a high demand on the property's switchboard and supply. They are not always the most economical or practical option for a whole house, particularly where multiple bathrooms may be used at the same time.

Upfront price versus long-term running costs

The cheapest system to buy is not always the cheapest system to own. A proper comparison should include the cost of the unit, installation, any changes to gas or electrical infrastructure, expected energy use and maintenance over its service life.

A replacement electric storage unit can be cost-effective when the wiring, location and tank size are already suitable. Replacing an existing gas system with a similar gas system can also reduce installation complexity. On the other hand, switching from electric to gas may involve new pipework, while switching from gas to electric may require electrical upgrades.

Energy pricing changes, so there is no single running-cost answer that applies to every home. Natural gas, LPG and electricity tariffs vary, as do household habits. Heat pumps can offer lower energy use, but the higher purchase cost needs to be weighed against expected savings. Solar generation can also change the equation for electric and heat pump systems, particularly where water heating can be timed to use daytime solar production.

For rental properties, the decision also needs to balance owner costs with reliable performance for tenants. A system that frequently runs out of hot water or is difficult to service can create avoidable call-outs and frustration.

Sizing matters more than most people expect

A good hot water system is sized around peak use, not average use. Think about how many people live or stay at the property, the number of bathrooms, shower duration, appliance use and whether several taps are likely to run together.

A couple in a two-bedroom unit has very different needs from a family home in Vasse, a rural property with visiting relatives or a busy holiday rental near the coast. Storage systems need enough capacity to cover the busiest period. Continuous-flow gas systems need enough flow capacity to meet simultaneous demand.

Water-efficient showerheads can reduce demand, but they do not remove the need for correct sizing. Very low incoming water temperatures in winter can also affect a continuous-flow system's output, because it has more heating work to do before delivering water at the set temperature.

Installation, safety and location

Whether you choose gas or electric, installation quality affects safety, efficiency and lifespan. Hot water systems need the right valves, pipework, drainage provisions and temperature control arrangements. In many homes, tempering valves are used to deliver safer water temperatures to bathrooms while allowing the tank to store water at a higher temperature for hygiene.

The location matters too. A tank may need a sound base and enough access for replacement and servicing. An outdoor gas unit needs compliant clearances and protection from damage. On rural properties, the installer may also need to consider LPG bottle placement, water pressure, long pipe runs and exposure to weather.

If an older system is leaking, making unusual noises, delivering rusty water or failing to hold temperature, it is worth assessing the whole setup rather than replacing the unit in isolation. Pipework condition, valves and household demand may have changed since the original system was installed.

Getting the decision right for your property

The practical answer to gas vs electric hot water is based on the property, not a one-size-fits-all rule. Gas often suits higher and more variable demand, particularly where an existing gas supply is available. Electric storage can be simple and reliable for modest, predictable use. A heat pump may be the best long-term option for households looking to reduce electricity consumption and make use of solar power.

SmartFlow Plumbing & Gas can assess your existing system, available services and expected hot water use before recommending a replacement or upgrade. A little planning before the old unit fails can help you avoid a rushed decision and leave your home, rental or business with hot water that suits it for years to come.