Gas-powered hot water systems are widely used across Australia in homes needing reliable heated water throughout the day. One option is the gas storage hot water system, which stores water in a tank and heats it using natural gas or LPG.
Many people want to know how quickly these systems reheat water, how they perform under heavy use, and whether they work during power cuts. Factors such as tank size, gas type, and installation location influence system performance and cost.
This guide explains how these systems operate, what to consider before choosing one, and the advantages and limitations involved.
Why Choosing the Right System Matters
Many households face inconsistent hot water supply, rising energy bills, and systems that stop working during power interruptions. Choosing the wrong system or size can cause inefficiency, higher running costs, and inconvenience.
Storage systems offer a consistent hot water supply and may help manage energy expenses more effectively.
What Makes Gas Storage Systems Reliable
Gas storage hot water systems use a storage tank and a gas burner to heat and maintain water temperature. They offer a steady water supply, especially for households using large volumes, and continue working during power cuts.
These systems are also known for providing hot water quickly and being responsive to varying household demands.
System Operation Explained
These systems use a gas burner located beneath the tank to heat water. A small flame (pilot light) stays lit, ready to ignite the main burner when the water temperature drops. Cold water enters the tank, settles at the bottom, and heats up. As it warms, it rises to the top, ready for use when taps are opened.
Temperature is managed through a thermostat. If water at the tank’s base falls below the set level, the main burner is activated. Excess pressure is released through a pressure relief valve. Some systems use hot gases passing through the tank’s centre or sides to transfer additional heat.
Storage tanks range from 90L to 300L, with 170L being common in larger households. Larger tanks may suit households with higher hot water usage, such as those with multiple bathrooms or frequent use of hot water appliances.
What to Check Before Buying
Energy Efficiency Standards
Units must meet Minimum Energy Performance Standards and Greenhouse and Energy Minimum Standards. Higher-rated units consume less gas to heat water.
Energy labels help compare models, and choosing a higher-rated system can result in long-term fuel savings.
Appropriate Tank Size
The size depends on household water needs and available space. Common sizes include 90L, 135L, and 170L. Larger households typically require tanks around 170L. A smaller tank may be suitable for couples or smaller families with limited hot water usage.
Available Gas Type
Check if natural gas (NG) or liquefied petroleum gas (LPG) is accessible. NG is common in many urban areas, while LPG is used in locations not connected to the gas grid. NSW installations must comply with the Gas and Electricity (Consumer Safety) Act 2017 and
Regulation 2018. Confirming local gas availability and pricing can help determine the most cost-effective option.
Benefits of Gas Storage Hot Water Systems
- Heats and reheats a 170L tank in about an hour, helping maintain supply during high demand
- Uses gas efficiently, especially in newer 4 or 5-star models, helping manage fuel use over time
- Continues to function during power outages, ensuring access to hot water at all times
Points to Consider
- Higher upfront cost for units and installation, though savings may occur over time with NG use
- Increased running costs of using LPG, as bottled gas is more expensive than NG and requires regular refilling
- Requires proper ventilation and safe positioning, especially for indoor units, with outdoor options depending on space
Maintenance and Legal Requirements
Gas systems need professional installation and periodic checks for safety and performance. Maintenance includes checking the burner, thermostat, pressure valve, and tank for wear.
Build-up or corrosion can reduce system efficiency and lifespan. In NSW, all work must follow the Gas and Electricity (Consumer Safety) legislation.
Choosing the Right Fit
Selecting the right unit involves matching household water use, available space, and local gas type. Comparing energy ratings and consulting a licensed professional helps in choosing a system that fits your needs. The right system supports consistent performance, safe operation, and cost-effective use.
For further details about choosing a suitable system, see our service guide here.
Support for Installation and Service
Need help selecting or installing a gas storage hot water system? Hogan Hot Water & Air Conditioning provides installation, repairs, and replacements across Newcastle, Lake Macquarie, Maitland, and the Central Coast.
Call us on 0488 029 618 or use our contact form for a quote or more information