Loading unit flow rate Vs simultaneous use flow rate

[Oshan Chathuranga]

Do any one know why flow rate given by loading units calculation doesn't match for simultaneous use?

 

[John.g]

Is your query something like this?

Vaillant ecoTEC Plus 938 - Low Flow Rate | UK Plumbers Forums | Page 2 | Plumbers Forums

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[Stigster]

I believe it's because they assume you will rarely if ever have all the outlets running at full blast all at the same time.

A bit like how sparkies can sometimes get away with using a smaller cable for a given number of socket because they don't need to account for a 3 bar electric fire running on every socket on a ring even though it's theoretically possible to do so.

There's a word for that but it totally escapes me right now.

 

[Ben-gee]

Diversification - is the word, but has fewer than 20 characters.

 

[Chuck]

Do any one know why flow rate given by loading units calculation doesn't match for simultaneous use?

Diversity factor - Wikipedia

en.wikipedia.org

You need to be very careful applying diversity factors to plumbing. A lot of demand for water is highly correlated particularly in the morning when everybody wants a shower at roughly the same time.