DHW Input Rating

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Hi eQUEST Folks,
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I used schematic design wizard for sizing DHW heater and found the default value of hot water use is 1 gal/person/day in the office building.?After I changed the?operation hour of main schedule for occupancy. The input rating kept the same. It seems to me that the unit of hot water use should be 1 gal/person/hour. ?Can anyone point out if my understanding is wrong?
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Thanks a lot
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Shaojie

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For standard office building 1 gal/person/day is about right for actual consumption. For DHW design of office buildings ASHRAE provides the chart below, which shows a recovery rate of 0.1 to 0.35 gal/person/hour. The difference depends on how much storage tank capacity you plan on having. Note that these values would be for peak loading and thus 1 gal/person/hour would result in far too much consumption than normal.

[cid:image003.png at 01C940F4.939170B0]

Thanks,

Dan Russell, EIT

[cid:image001.jpg at 01C940F3.596EBD30]

Dan Russell's picture
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Dan,
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Thanks a lot for your feedback.?It? is really helpful for my projects.
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Best,
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Shaojie

eric wang's picture
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Does anyone know if eQUEST outputs this information and where to find it?

Thanks!

Jay Keazer, EI

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