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How to size a hot water cylinder?

2 Answers

Answered by BoilerOne

29th May 2019

BoilerOne answered the question "How to size a hot water cylinder?"

When sizing an unvented cylinder firstly determine the type ie direct or indirect. As an average a 3 bed house with 2 baths/showers allow 180 - 210 litre a 4 bed house with 2 baths/showers allow 210 - 250 litre Any thing larger 300 litre + BoilerOne recommend you consult a heating engineer with an unvented qualification to install your cylinder.

Answered by Fortune And Co Plumbing and Heating Ltd

22nd May 2019

Fortune And Co Plumbing and Heating Ltd answered the question "How to size a hot water cylinder?"

When selecting the size of your hot water cylinder there is a simple rule of thumb it is for a typical domestic household, you should allow between 35 and 45 liters for every occupant. that said a mains pressure system can use about 18 liters of water per minute at 40 degrees Celsius if a decent quality shower head is used.

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