Hello All<br><br>We're being audited on the energy model for the dhw saving. I'm just wondering if this make sense and from your experience if it would be acceptable to the LEED reviewer.<br><br>What I've done is taken numbers from ASHRAE Handbook HVAC Applications DHW consumption per fixture for office use.<br>
7.6 L / hr for lavatory fixtures<br><br>Showers, kitchen sinks, and Lavatory sinks.<br>Service sinks I'm not quite sure whether i should include all 5 service sinks (one on each level) or just one sinks since there won't be any mopping done since most of the building Under floor air distribution and i'll do a write up of course to explain my reasoning.<br>
<br>I took the consumptions per fixture numbers multiplied by the amount of fixture then by the demand factor given.<br><br>7.6 L/h x 55 # of fixtures x 0.3 demand factor<br><br>for each type i took the savings percentage based on each fixture. So baseline is 2.5 and proposed case is .5 for lavatory fixtures<br>
<br>.5 proposed case / 2.5 base case<br><br>So the proposed domestic hot water demand is 25.08 L / hr or 0.11 gpm.<br><br>The reviewer had asked for percentage of hot water vs cold water, and temperature at the fixtures, i found that harder to substantiate. So I thought this process would be a lot better.<br clear="all">
<br>Tai Lieu<br>