Hot Water Calculator

Greater Brisbane, Gold Coast and Sunshine Coast
 
Queensland Building and Construction Commission
Licences QLD
Licences ARC tick
Licences-Solar-S7166503
Licences Security
Master Plumbers Association of Queensland
Gold Master Electrician
Special Offer

Trade in Your Old System for $150* Off

T&Cs Apply, See Below

Not Sure What Hot Water System Size You Require In Brisbane, Gold Coast, Logan, Ipswich, Moreton Bay, Redlands and Sunshine Coast?

Once determining the below factors you should be able to come to a definitive decision about which size hot water system is best going to suit your needs and save you money in terms of efficiency.

Still have questions? Speak to us on 1300 054 488 to get professional advice specific to your requirements. You can also enquire here.

Only include loads that use hot water.
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Good Better Best Options for Every Home and Budget

More Choice. Clear Options. The Same Trusted Fallon Service.

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.

*T&Cs apply

Trusted by over 8,500+ reviewers on Google.

Rated 4.6 stars from more than 8,500 reviews in Brisbane

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7 September 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
Thanks Jason, for taking a quick look at our washing machine and giving really great, practical advice.
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colin varney profile picture
colin varney
6 September 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
Jason checked over our washing machine thanks very much
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Brad M profile picture
Brad M
6 September 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
Job done nicely. Neat work and done quickly.
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Mahilal Ratnapala profile picture
Mahilal Ratnapala
6 September 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
Jason fixed the washing machine
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Louise Morphy profile picture
Louise Morphy
6 September 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
Have been using Fallons for a few years now and cant fault them. Great communication, great work. Very reliable.
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Phil Colbourne profile picture
Phil Colbourne
6 September 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
Brodie (aircon tech), performed brilliantly! He explained everything that was required perfectly & nothing was left out. At the conclusion of the Gold Service he further explained everything he covered & the general condition of the ducted air components. Overall, an extremely courteous & capable technician. We find that Fallons are generally on the expensive side, however, they are particularly reliable & competent.
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Louis Rago profile picture
Louis Rago
5 September 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
Fallons conducted a plumbing check and installation of whole of house water filter. Ethan, the tradesman/technician who conducted the work, showed himself to be a professional of the very highest order in every respect; work was outstanding and to the highest quality and his advice excellent Mepz came and conducted the necessary repairs on 1 Sep. Mepz did an outstanding job...very professional & courteous; he explained clearly all the steps in the job & provided a very comprehensive brief on completion...simply outstanding
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Alex B profile picture
Alex B
4 September 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
Back in 2018, when our house was a decade old and things were starting to break, I decided to get some tradies on my phone list and myself on their books. I had a leaking kitchen tap that needed replacing and I decided to go with some local plumbers, not just for the work but to start forming client-supplier relations. I tried three plumbers and got nothing but frustration: Job too small, not answering the phone, not calling back as promised, etc, etc. I was getting irritated which irritated my wife so she rang Fallon Solutions behind my back. We haven't looked back since. Most of our trade work is now done by Fallon Solutions. Are they a bit pricey? Probably. But I don't care. I'm happy to pay the premium because the phone gets answered, the tradies turn up when promised, they do great work, I've never had a fault with any of the work, I've never had to call them back for rectification, they are friendly, courteous and they clean up after themselves and take their shoes off inside the house. I got the switchboard upgraded in 2018 and every electrician that has looked at it since has commented on how good the work is. Right now a tech is replacing our air conditioning pipe insulation. I'm just wondering what my next Fallon Solutions project will be. Probably replacing the weathered laundry door. Update 31 August 2026: Part A: Had Jeff come over to provide some electrical quotes this morning. As per usual, friendly, courteous, knowledgable, professional. He provided some reasonable quotes which were all accepted, with the work to be done on Friday. But the stand-out points were Jeff helping me out with two minor things FOR FREE. One was a dodgy light socket - socket turned out fine and just needed a new globe. And the second one was moving my TV which required fiddling with the power cord. Both done, as noted, for free, and cheerfully. Thanks, Jeff. Part B: Abraham came out this morning and repaired some worn decking. As with Jeff, friendly, courteous, knowledgable, professional. A pleasure to have on-site. Thanks, Abraham, for doing a great job. For Fallon Solutions to consider - maybe add painting/ oiling to the trades selection, that way brand new carpentry can be protected after installation. Part C: Had Ethan come out to discuss how best to feed the washing machine with clean water. I had one idea. Ethan had a better idea that will use the rainwater we've got stored. So, I'm looking forward to the better solution being installed on Friday. Updated 4 September 2026: Jeff, Rua and Max did a great job today of installing more power outlets including some tricky ones in and outside the house. As always, friendly, courteous and professional. Everything cleaned up and functioning well. Thanks, guys. Reece also did a great job installing a rainwater tank water purifier.
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Mitchell Port profile picture
Mitchell Port
4 September 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
Great service, pricing is competitive, fast turn around
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Warren McGaw profile picture
Warren McGaw
4 September 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
A big Thankyou to Fallon and the tradie Jesse that came onsite and fixed all our plumbing needs. Awesome job!

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