Hot water is something every home relies on, whether it’s for your morning shower, washing dishes, or doing the laundry. But when it’s time to install a new system or upgrade your existing one, many homeowners are left wondering: Which hot water system is best for my home?
Know Your Options: Types of Hot Water Systems
There are four main types of hot water systems used in Australian homes:
Electric Hot Water Systems
- How it works: Uses electricity to heat water stored in a tank or on demand.
- Pros: Affordable upfront cost, easy to install.
- Cons: Higher running costs unless combined with solar or off-peak tariffs.
- Best for: Smaller households or where gas isn’t available.
Gas Hot Water Systems
- How it works: Heats water with natural gas or LPG.
- Pros: Fast heating, lower operating costs, works in blackouts.
- Cons: Requires a gas connection; may have higher installation costs.
- Best for: Medium to large households with gas access.
Solar Hot Water Systems
- How it works: Uses solar panels and a storage tank (with an electric or gas booster).
- Pros: Lowest long-term costs, environmentally friendly.
- Cons: Higher initial cost; requires roof space and sunlight.
- Best for: Eco-conscious families and sunny locations like Sydney.
Heat Pump Hot Water Systems
- How it works: Extracts heat from the air to warm water (like an air conditioner in reverse).
- Pros: Very energy efficient; rebates available.
- Cons: Expensive to install; performance may drop in cold climates.
- Best for: Energy-conscious households with space for the unit.
Consider Storage vs. Continuous Flow
- Storage Systems heat and store water in a tank. Great for households with higher usage, but they can run out during peak times.
- Continuous Flow (Instantaneous) Systems heat water as needed. They never run out, but may struggle with multiple taps running simultaneously.
We can help you choose the right capacity or flow rate based on your usage patterns.
Factor in Household Size and Usage
Here’s a rough guide for selecting the right size:
| Household Size | Suggested System Size (Storage) | Suggested System Size (Instantaneous) |
| 1–2 people | 90–130L | 16–20L/min |
| 3–4 people | 135–170L | 20–24L/min |
| 5+ people | 200L+ | 24L+/min |
Still unsure? The team at Collis Bros Plumbing can assess your family’s needs and recommend the best fit.
Energy Efficiency and Running Costs
While cheaper systems are attractive upfront, running costs can add up over time. Choosing an energy-efficient system can save you hundreds each year.
- Solar and heat pump systems have the lowest ongoing costs.
- Gas systems offer a good balance between cost and performance.
- Electric systems are best with off-peak tariffs or solar PV panels.
We’re happy to walk you through the expected lifetime costs of each option during your consultation.
Installation, Regulations & Rebates
Professional installation is critical for safety, compliance, and performance. At Collis Bros Plumbing, our licensed technicians ensure:
- Full compliance with Australian plumbing and safety standards
- Proper placement and pressure regulation
- Certification and warranty documentation
- Advice on accessing government rebates for solar and heat pump systems
We also remove and dispose of old systems, making the upgrade process seamless.