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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Hi Everyone,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>I have not seen my specific situation adequately addressed in the LEED documentation, so I would be interested to hear others’ opinions on the matter: <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>I am modeling a building which relies on a central plant for heating and cooling. The plant serves only a few buildings. Heating enters the buildings as HW, not steam. My building is designed such that there are no hot water pumps…the BAS communicates back to the central plant pump system, which adjusts flow appropriately. All flow within the building is controlled by valves. My basic question is, in which models do I include HW pump energy (that’s 4 models…Step 1 Baseline and Proposed, and Step 2 Baseline and Proposed)?<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Here are my thoughts. For certain I need to include HW pumps in the Step 2 Baseline, as for any Baseline using System 7. That leaves only 3 models to ponder. The LEED guidance I have read leads me to believe I should include HW pumps in Step 1 Baseline as well. The intention of Step 1 is to model the buildings independent of the central plant, which would lead me to <i>not</i> include the HW pump energy in my Step 1 Proposed model. Am I now cheating by including the pump energy in the Baseline but not the Proposed for Step 1? <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>For Step 2, LEED documentation indicates that <i>secondary</i> pump energy needs to be modeled in the proposed aggregate building/DES model. This would lead me towards not modeling the central plant pumps, but again, is that cheating? A portion of the central plant pump energy is certainly being used to push water through my building…<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Thanks for any thoughts/opinions you may have,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Christian <o:p></o:p></span></p></div></body></html>