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Plenums necessary for LEED model?

I'm preparing an energy model to be used for a LEED 2009 EAp1/c1 submission. The building I'm modelling is a single storey school, which has a mix of exposed ceilings and drop ceilings, as well as a few spaces (e.g. the gymnasium) with higher ceiling heights than the rest of the building.

I'm using eQuest, and without getting into too much detail I will just say that based on my experience with eQuest, my life will be a lot easier if I just model the entire building as exposed ceilings--in other words, remove the ceiling plenums. It seems to me this would have a very marginal effect on the model results, as I wouldn't be changing the exterior surface area, but I wanted to see if anyone had any experience with this.

Basically I'm wondering if removing the ceiling plenums in the manner described above:

  • Would unduly affect the accuracy of my simulation results
  • Would be kosher for LEED

Any insights would be much appreciated!

Plenums necessary for LEED model?

I'm preparing an energy model to be used for a LEED 2009 EAp1/c1 submission. The building I'm modelling is a single storey school, which has a mix of exposed ceilings and drop ceilings, as well as a few spaces (e.g. the gymnasium) with higher ceiling heights than the rest of the building.

I'm using eQuest, and without getting into too much detail I will just say that based on my experience with eQuest, my life will be a lot easier if I just model the entire building as exposed ceilings--in other words, remove the ceiling plenums. It seems to me this would have a very marginal effect on the model results, as I wouldn't be changing the exterior surface area, but I wanted to see if anyone had any experience with this.

Basically I'm wondering if removing the ceiling plenums in the manner described above:

  • Would unduly affect the accuracy of my simulation results
  • Would be kosher for LEED

Any insights would be much appreciated!