Key Takeaways
- Continuous flow systems provide endless hot water on demand, perfect for smaller homes or irregular usage.
- Storage tank systems store hot water, making them ideal for larger households with consistent hot water needs.
- Continuous flow systems are more energy-efficient, but storage systems are easier to replace.
- Consider your household size, water usage, and available space when deciding.
Choosing between a continuous flow (instantaneous) and a storage tank hot water system can be a tricky decision. Each type has its own benefits, but the right choice depends on your household size, water usage habits, and available space. This guide breaks down the pros and cons of each system to help you decide which suits your home.
What is a Continuous Flow Hot Water System?
A continuous flow (or instantaneous) hot water system heats water only when it's needed, providing hot water on demand. These systems are compact, energy-efficient, and provide endless hot water, meaning you won’t run out, even if you have back-to-back showers.
How It Works
The system uses a gas burner or an electric element to heat water as it flows through the unit. Continuous flow systems are wall-mounted, taking up minimal space, and they heat only the water you use. This makes them highly energy-efficient as there are no standing losses.
Advantages of Continuous Flow Systems
- Endless hot water: You’ll never run out, as it’s heated on demand.
- Energy-efficient: No stored water means no wasted energy heating an entire tank.
- Compact size: Ideal for homes with limited space or apartments.
- Quick installation: Easier to install compared to storage tank systems.
For more information on Gas Continuous Flow Hot Water Systems and Electric Continuous Flow Systems, check out our range.
What is a Storage Tank Hot Water System?
A storage tank hot water system stores a set amount of hot water in an insulated tank. When you turn on the tap, hot water is drawn from the tank, and cold water is added to be heated.
How It Works
Electric and gas storage tanks heat water and store it for later use. The water is heated to the preset temperature and kept warm until used. Once the hot water is drawn, the tank refills and reheats, ensuring hot water is available when needed.
Advantages of Storage Tank Systems
- Large storage capacity: Sizes from 80L to over 400L, suitable for larger households.
- Lower upfront cost: Cheaper to purchase and install than continuous flow systems.
- Steady supply: Multiple taps and showers can run at once, as long as hot water is in the tank.
If you’re considering a Storage Tank Hot Water System, take a look at the available options at Renovation Kingdom.
Key Differences Between Continuous Flow and Storage Tank Systems
| Feature | Continuous Flow Systems | Storage Tank Systems |
|---|---|---|
| Hot Water Availability | Endless hot water, on-demand | Limited by tank size, potential shortage |
| Space Requirement | Compact, wall-mounted | Bulky, requires floor space |
| Energy Efficiency | High (no heat loss) | Moderate (heat loss from tank) |
| Running Costs | Generally lower | Higher (depends on size) |
| Best For | Smaller homes, irregular use | Larger households, consistent demand |
Which System is Right for Your Home?
Best for Smaller Homes or Apartments
Continuous Flow systems are ideal for small households, apartments, or homes with limited space. Efficient, provide endless hot water, and fit into tight spaces.
Best for Larger Households
Storage Tank systems are better for larger homes with multiple bathrooms, providing reliable hot water for several taps and showers simultaneously.
Considerations
- Household Size: Continuous flow suits 1–3 people, storage tanks work well for 4+ people.
- Space: If space is limited, continuous flow is better.
- Usage Pattern: Intermittent use favors continuous flow; high simultaneous demand favors storage tanks.
- Energy Tariffs: Off-peak electricity rates can make storage tanks more cost-effective.
To compare Gas Hot Water Systems and Electric Hot Water Systems, visit our full range today.
FAQs
- Which system is cheaper to run? Gas continuous flow is generally cheaper than electric storage, but local prices and usage affect costs.
- Can I switch from storage tank to continuous flow? Yes, but plumbing or gas line changes may be required. Consult a professional installer.
- How long do these systems last? Storage tanks: 8–12 years; Continuous flow: 10–15 years with proper maintenance.
- Do I need a tempering valve? Yes, required for safe outlet temperatures and regulatory compliance.
Next Step
Ready to choose the best hot water system for your home? Compare our full range of hot water systems at Renovation Kingdom for tailored advice and professional installation.