Gas vs Electric Hot Water Systems: Which Is Better?

MDG Plumbing Services
May 18
3 min read

Choosing the right hot water system for your home is an important decision. Whether you are replacing an old unit or installing a new system, one of the most common questions homeowners ask is: should you choose gas or electric hot water?

Both systems have their advantages depending on your household size, budget, energy usage, and property setup. Understanding the differences can help you choose the best option for your home and avoid unnecessary running costs in the future.

How Gas Hot Water Systems Work

Gas hot water systems use either natural gas or LPG to heat water. These systems are popular in many Australian homes due to their fast heating capabilities and lower operating costs in some areas.

Gas systems are available in storage tanks and continuous flow units. Continuous flow systems heat water only when needed, which can improve energy efficiency and provide endless hot water.

Advantages of Gas Hot Water Systems

Fast water heating and recovery times
Lower running costs if natural gas is available
Continuous flow options provide endless hot water
Can continue operating during power outages (depending on the model)
Ideal for larger households with high hot water usage

Disadvantages of Gas Hot Water Systems

Higher upfront installation costs
Requires access to natural gas or LPG
Gas systems require regular servicing for safe operation
Installation can be more complex than electric systems

How Electric Hot Water Systems Work

Electric hot water systems use electric heating elements to heat stored water inside a tank. These systems are common due to their affordability and simple installation process.

Electric systems are available in standard storage tanks and newer energy-efficient heat pump models.

Advantages of Electric Hot Water Systems

Lower upfront purchase and installation costs
Easier to install in most homes
Widely available and simple to replace
Heat pump options can improve energy efficiency
Suitable for smaller households or lower water usage

Disadvantages of Electric Hot Water Systems

Higher running costs in many areas
Slower recovery times compared to gas
Can increase electricity bills significantly
Standard systems may struggle with large family usage

Which Hot Water System Is More Energy Efficient?

Energy efficiency depends on the type of system, household usage, and local utility costs.

Continuous flow gas systems are generally considered highly efficient because they only heat water when required. However, modern electric heat pump systems are also becoming increasingly energy efficient and environmentally friendly.

Traditional electric storage tanks are usually the most expensive to run over time, especially for larger households.

Which System Is Better for Large Families?

For larger families with multiple bathrooms and high daily hot water usage, gas hot water systems are often the preferred option. Their faster recovery rates and ability to provide continuous hot water make them more reliable during busy periods.

Smaller households or apartments may find electric systems more cost-effective due to lower installation expenses.

What About Installation Costs?

Electric hot water systems are usually cheaper to install because they require less infrastructure. Gas systems may require gas connections, ventilation, or upgraded pipework depending on the property.

While gas systems can cost more initially, some homeowners recover those costs over time through reduced energy bills.

Choosing the Right Hot Water System for Your Home

The best hot water system depends on:

Your household size
Your daily hot water usage
Whether your property has access to natural gas
Your installation budget
Your long-term energy costs

A licensed plumber can assess your home and recommend the most suitable system based on your needs.

Need Help Choosing a Hot Water System?

At MDG Plumbing Services, we supply, install, repair, and replace both gas and electric hot water systems across Sydney. Whether you need advice on upgrading your current system or require urgent hot water repairs, our team is here to help.