Determining Hot Water System Size
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What Size Hot Water System Do I Need in Brisbane, Gold Coast, Logan, Ipswich, Moreton Bay, Redlands and Sunshine Coast
Determining the ideal hot water system size is crucial to ensure it meets your household’s requirements. Typically, this is calculated based on daily showers, baths, laundry, and dishwasher usage. As a rule of thumb, consider the number of occupants in your home (add one more if you have a dishwasher).
Fallon Solutions has over 60 years experience and is unmatched in it’s expertise in gas and electric hot water systems. Whether you need supply and installation, repairs, replacements, or servicing, we’ve got you covered. Our team is well versed in all major hot water heater brands, including Rheem, Bosch, Rinnai, Aquamax, Dux, Vulcan, Saxon, Thermasol, Therman and Quantum.
We can also supply, service and install Apricus, Rheem Rinnai, and Therman solar hot water systems and Quantum, Bosch and Rheem heat pumps. And for those that are looking for a smaller solution we also supply and install Zip Hot Water – boiling and chilled water systems.
We are available 24/7 for hot water emergencies in the Greater Brisbane area.
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Your household size and the number of occupants play a crucial role in determining your hot water requirements. Larger families naturally demand more hot water. When selecting the right hot water system, consider the number of people in your home, as well as the consumption activities within your home. These can include:
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Showering
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Dishwashing
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Laundry
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General household use
Furthermore, identifying peak usage times is essential. For example, mornings and evenings often see higher water usage, which may necessitate a system capable of higher flow rates to meet this demand.
How Do I Determine My Household’s Hot Water Demand?
When trying to determine your household’s demand, you need to consider the amount of people living within the property. As a general rule we consider:
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For a Family of Four: Typically, a family of four in Australia needs a hot water system that can supply approximately 125 to 360 litres daily. The exact requirement will depend on factors such as the type of heater / system and water usage patterns.
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For a Household of Three: The average Australian uses about 76 litres of hot water daily. Therefore, a household of three would consume around 228 litres
per day. This can vary based on specific usage factors.
Choosing the Right Size
Below are some tables giving you a rough guide to help you choose the correct size for your next hot water system.
Electric Hot Water System Size Guide (Storage)
| Household Size | Off-Peak Tariff (Tank Size) | Continuous Tariff (Tank Size) |
|---|---|---|
| 1 – 2 people | 125 litres | 50 litres |
| 2 – 3 people | 160 litres | 80 litres |
| 3 – 4 people | 250 litres | 125 litres |
| 4 – 6 people | 315 litres | 160 litres |
| 5 – 9 people | 400 litres | 250 litres |
Gas Hot Water System Size Guide (Storage)
| Household Size | Tank Size |
|---|---|
| 1 – 2 people | 90 litres |
| 2 – 3 people | 130 litres |
| 3 – 4 people | 170 litres |
| 4 – 6 people | 200 litres |
Gas Instant Hot Water System Size Guide
| Number of Bathrooms | System Size |
|---|---|
| 1 | 16 litres |
| 1 – 2 | 20 litres |
| 2 – 3 | 26 litres |
| 3 or more | 32 litres |
Other factors to consider when choosing the best hot water system
- Location of the hot water system (eg. inside, outside or on the roof etc) What are the installation cost, running cost and green credentials?
- What are the installation cost, running cost and green credentials?
- What type of hot water system (eg. gas, electric, instant etc)
Selecting the right hot water system size is crucial for ensuring efficient and comfortable hot water supply in your home. This comprehensive guide will help you understand the key factors to consider when making your decision.
System Type and Energy Source
The type of hot water system and its energy source significantly impact its size and efficiency. Common tank-based systems include gas, electric, solar, and heat pump options. Each has its own advantages and drawbacks in terms of initial cost, energy efficiency, and environmental impact.
Temperature Rise
Temperature rise, the difference between the desired hot water temperature and the incoming cold water temperature, is a critical factor. A higher temperature rise generally requires a larger system to meet your hot water needs.
Climate
Your region’s climate plays a crucial role in determining system size. Colder climates may necessitate larger systems due to increased heat demand. Conversely, warmer climates with ample sunlight are ideal for solar water heaters. Additionally, consider seasonal variations in hot water usage, especially during peak times.
Budget
While initial costs vary, energy-efficient systems can often offset higher upfront prices with long-term savings. Explore government incentives or rebates to reduce the financial burden.
Building Type
The size and occupancy of your home influences hot water demand. Larger homes or commercial properties require more substantial systems to accommodate multiple occupants and fixtures.
Plumbing Infrastructure
Older or inefficient plumbing can hinder water flow, necessitating a larger system. Regular maintenance, including leak repairs and flushing, can improve efficiency and reduce the required system size.
Future Expansion
Consider your home’s potential growth. Planning for future additions or increased occupancy can help you avoid costly upgrades later.
Hot Water System Brands
Not sure which hot water system will suit your own particular needs? We are specialists in the following hot water systems;
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Good Better Best Options for Every Home and Budget
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Every home, job and budget is different. That’s why Fallon Solutions now offers Good, Better, Best* options across our home trade services.
Instead of a one-size-fits-all recommendation, your technician will assess the job, explain what they’ve found, and provide clear options so you can choose the solution that best suits your home, your needs and your budget.
Whether you need a safe essential fix, a longer-term upgrade, or the most comprehensive solution available, you stay in control.
How Good Better Best works:
- Good: A safe, practical option to get the issue fixed.
- Better: A stronger solution designed for improved performance, reliability or efficiency.
- Best: A premium option offering the highest level of comfort, durability, efficiency or warranty coverage.
With Fallon Solutions, you’ll receive clear advice, upfront options and the same trusted workmanship backed by our limited lifetime labour warranty.
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Meet Josh
Joshua,
Hi there! I’m Josh, your plumbing and gas fitting technician from Fallon Solutions.
I enjoy tackling the challenges that come with the trade, and I’ve cherished the opportunity to assist our valued customers at Fallon Solutions over the past seven years.
Terms and Conditions
- This offer is valid for domestic customers only.
- While this offer cannot be combined with any other offer, it can be used in conjunction with a 15% Home Protection Plan member discount.
- This offer does not apply to travel fees.
- This offer is applicable during normal business hours, not after-hours call-outs.
- The homeowner must be present during the hot water system replacement.
- Not applicable for under sink hot water purchases
