Why Choose Gas Hot Water?
Gas hot water systems offer a balance of reliability, reasonable running costs, and consistent performance. For Perth homes with gas connections, they remain a popular and practical choice.
While not as efficient as heat pumps, gas systems offer lower running costs than electric storage and provide reliable hot water without the higher upfront investment of renewable options.
Gas Storage Systems
Gas storage systems heat and store water in an insulated tank, keeping it ready for use:
Advantages:
- Consistent hot water supply
- Lower upfront cost than instantaneous
- Simple, proven technology
- Can supply multiple outlets simultaneously
Considerations:
- Uses energy maintaining water temperature (standby losses)
- Limited by tank capacity
- Requires space for the tank
Typical specifications:
- Capacity: 130-170 litres for most households
- Energy rating: Look for 5+ stars
- Lifespan: 10-15 years with proper maintenance
Continuous Flow (Instantaneous) Systems
Continuous flow systems heat water on demand as it passes through the unit:
Advantages:
- Unlimited hot water (never runs out)
- No standby energy losses
- Compact, wall-mounted units
- Longer lifespan than storage
Considerations:
- Higher upfront cost
- Flow rate limited by unit capacity
- May struggle with multiple simultaneous uses
Typical specifications:
- Flow rate: 20-32 litres per minute
- Temperature rise: 25°C at rated flow
- Lifespan: 15-20 years
Which Type Suits Your Home?
| Factor | Gas Storage | Continuous Flow |
|---|---|---|
| Household size | 1-4 people | 2-6+ people |
| Simultaneous use | 1-2 outlets | May need multiple units |
| Space | Requires floor space | Wall-mounted |
| Running cost | Higher (standby loss) | Lower |
| Upfront cost | $1,500-$2,500 | $2,000-$4,000 |
| Best for | Consistent, predictable use | Variable demand, space constraints |
Gas Hot Water Running Costs
Gas hot water costs vary based on usage and gas prices:
| System Type | Annual Cost (avg household) |
|---|---|
| Gas Storage | $350-$500 |
| Gas Continuous Flow | $300-$450 |
| Electric Storage (comparison) | $800-$1,200 |
Based on typical Perth household usage and current gas rates
Installation Requirements
Gas hot water installation requires:
For all gas systems:
- Adequate gas supply (we assess this)
- Proper ventilation/fluing
- Tempering valve for WA compliance
- Licensed gas fitter for all work
For storage systems:
- Ground space or stand for tank
- Access for maintenance
For continuous flow:
- External wall for flue
- Adequate clearances
We assess your property and handle all requirements.
Gas Safety and Compliance
All our gas installations include:
- Licensed gas fitter performing all work
- Proper fluing and ventilation
- Gas pressure and leak testing
- Compliance certificate
- Safety labels and documentation
Gas work is strictly regulated for good reason. We never cut corners on safety.
Brands We Install
We supply and install all major gas hot water brands:
- Rinnai: Excellent continuous flow range
- Rheem: Reliable storage and continuous flow
- Bosch: Quality continuous flow units
- Dux: Good value gas storage
We recommend based on your needs, not brand preferences.
Maintenance Requirements
Gas systems require regular maintenance:
Annually:
- Check gas connections and seals
- Inspect flue for blockages
- Test safety devices
Every 5 years:
- Replace sacrificial anode (storage)
- Service burner and heat exchanger
We offer maintenance services to ensure safe, efficient operation.
Making the Decision
Gas hot water is a good choice if:
- You have existing gas connection
- You want reliable, proven technology
- Heat pump/solar doesn’t suit your property
- You need lower upfront costs than renewable options
Consider alternatives if:
- You want maximum energy efficiency
- You’re looking to reduce gas dependency
- Government rebates make heat pumps more affordable
Our free assessment helps you make the right choice.
Ready to Upgrade?
Contact us for a free assessment. We’ll evaluate your needs and provide honest advice on whether gas is the best option for your home.