Gas Hot Water Systems Perth

Gas hot water systems remain a popular choice for Perth homes, offering lower running costs than electric resistance heating and reliable performance. We install and service both storage and instantaneous gas systems.

Gas Storage vs Instantaneous

Understanding the difference helps you choose the right system:

Gas Storage Systems

A tank (typically 135-170L) stores pre-heated water. The gas burner heats water in the tank as needed.

Advantages:

• Lower purchase cost
• Simple installation
• Works with low water pressure
• Good for very high-demand situations

Considerations:

• Standby heat losses (tank loses heat between uses)
• Takes up more space
• Can run out of hot water with heavy use
• Limited by tank capacity

Gas Instantaneous (Continuous Flow)

Water is heated on demand as it passes through the unit. No storage tank required.

Advantages:

• Never runs out of hot water
• Compact wall-mounted units
• No standby losses
• Only heats water when needed
• Longer lifespan than storage

Considerations:

• Higher purchase cost
• Requires adequate water pressure
• May struggle with multiple simultaneous high-flow outlets on undersized units

For most Perth households, we recommend instantaneous systems for their efficiency and unlimited supply.

Sizing Your System

Proper sizing is crucial:

Instantaneous Sizing

Based on flow rate (litres per minute) and temperature rise. A typical Perth household needs:

• 1 bathroom: 20-24 L/min
• 2 bathrooms: 24-28 L/min
• 3+ bathrooms: 28-32 L/min or multiple units

Storage Sizing

Based on household size and usage patterns:

• 1-2 people: 135L
• 3-4 people: 170L
• 5+ people: 250L or larger

We assess your actual usage patterns to recommend the right size.

Installation Considerations

Gas hot water installation requires:

• Gas connection: Natural gas or LPG supply
• Flue requirements: Safe exhaust of combustion gases
• Ventilation: Adequate air supply for combustion
• Location: External or in compliant internal location
• Water pressure: Minimum pressure for instantaneous units

Our licensed gas fitters ensure all requirements are met.

Gas vs Heat Pump Economics

While gas costs less than standard electric, modern heat pumps can be cheaper to run:

If you have existing gas infrastructure, a gas system may be the practical choice. For new installations, we often recommend heat pumps for long-term savings.

Brands We Install

We’re authorised installers for all major gas hot water brands:

• Rinnai: Market leaders in continuous flow
• Rheem: Reliable storage and instantaneous
• Bosch: Quality German engineering
• Dux: Australian-made options

Our recommendations are based on your needs, not brand relationships.

Safety and Compliance

All gas work must be completed by a licensed gas fitter. We provide:

• Class A licensed installation
• Compliance certificates
• Safety testing and commissioning
• Manufacturer warranty registration

Never attempt DIY gas work - it’s illegal and dangerous.