Hot Water Systems: Gas Vs Electric

Hot Water Systems: Gas Vs Electric

Hot Water Systems : Choosing the right hot water system is crucial for any homeowner, and often the decision comes down to gas versus electric systems. Both have their advantages and disadvantages, and the best choice depends on various factors including efficiency, cost, and reliability.

Gas Hot Water Systems

Hot water system


– Cost-Effective Operation: Gas hot water systems generally have lower operational costs because gas is often cheaper than electricity.

– Faster Heating: They can heat water faster than electric systems. Giving you instant hot water when needed

– Less Dependent on Electricity: Useful during power outages as they don’t rely on electricity to operate.



– Higher Initial Cost: The upfront cost of purchasing and installing a gas system can be higher. Usually upgrade to your existing gas mains is required

– Requires Gas Connection: Not suitable for homes without an existing gas line, although other options like LPG gas bottles can be installed

– Potential for Gas Leaks: There is a small risk of gas leaks, which can be dangerous.

Electric Hot Water Systems


– Lower Initial Cost: Electric systems are usually cheaper to buy and install when existing pipework is already set up for electric systems

– Availability: Electricity is widely available, making electric systems suitable for most homes.

– Safety: Electric systems don’t carry the same risk of gas leaks.


– Higher Running Costs: Electricity costs more than gas, leading to higher running costs.

– Slower Heating Time: Electric systems typically take longer to heat up water.

– Dependence on Electricity: During a power outage, you won’t have access to hot water.

Instantaneous Vs Storage Tank


Instantaneous Systems:

– Efficiency: Instantaneous systems heat water on demand, which can be more energy-efficient.

– Space-Saving: They are compact and save space.

– Unlimited Hot Water: Provides continuous hot water when needed

Storage Tank Systems:

– Reliability: Storage tanks offer a reliable supply of hot water.

– Cost: Generally cheaper to purchase than instantaneous systems.

– Heat Retention: Can retain heat for a long time, reducing the need to reheat.

The Environmental Impacts of Gas vs Electric Hot Water Systems

When it comes to choosing a hot water system, the environmental impact is an increasingly important factor for many homeowners. Both gas and electric hot water systems have distinct environmental footprints that are worth considering.

Gas Hot Water Systems

Gas hot water systems are often praised for their efficiency. They heat water quickly and are typically more energy-efficient in the long run. However, they do rely on natural gas, a fossil fuel, which means their operation is associated with greenhouse gas emissions. Despite this, gas systems generally produce lower greenhouse emissions compared to electric models, resulting in a smaller carbon footprint.

Electric Hot Water Systems

Electric hot water systems can have a higher environmental impact, especially if the electricity is sourced from non-renewable energy sources like coal or natural gas. However, if the electricity comes from renewable sources, such as solar or wind power, the environmental impact is significantly reduced. Heat pump hot water systems, a type of electric system, are very energy-efficient and can be powered by renewable electricity, making them an environmentally friendly option.

Instantaneous vs Storage Tank Systems

The choice between instantaneous and storage tank systems also affects environmental impact. Instantaneous systems, which heat water on demand, can be more energy-efficient and thus have a lower environmental impact compared to storage tanks, which maintain a constant supply of hot water but may require more energy to keep the water heated.


When considering upgrading or replacing your hot water system, it’s essential to weigh the pros and cons of both gas and electric systems. Think about the long-term costs, the efficiency of the system, and how it fits into your home infrastructure. If you’re looking to make an informed decision and discuss your options with a professional, don’t hesitate to reach out to your local plumber. For homeowners in Australia, seeking expert advice on whether a gas or electric hot water system suits your needs, visit for guidance and installation services. Make the right choice for your home and enjoy the comfort of reliable hot water.