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Water supply fixture units for bathroom groups
September 17, 2019
10:30 am
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rdeagan@gmail.com
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Forum Posts: 15
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April 10, 2015
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In IPC 2015, Table E103.3(2), the hot water supply fixture units for a bathroom group with a flush valve water closet are double that for a bathroom group with a flush tank.

Does anyone know the rationale behind this?  It seems as though the hot WSFU would be the same regardless of the type of control on the water closet.

It can make an appreciable difference in the hot water pipe and water heater sizing in a facility that has a large number of bathroom groups, such as a hotel or an assisted living facility.

Thanks!

David