[Equest-users] DHW Input Rating

[Dan Russell]

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.

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Thanks,

 Dan Russell, EIT

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From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of eric wang
Sent: Wednesday, November 05, 2008 12:13 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] DHW Input Rating

Hi eQUEST Folks,

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?

Thanks a lot

Shaojie


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