[Bldg-sim] Ventilation rate baseline in a major renovation

[David Eldridge]

Not unrecognized, the owner will save lots of energy which should be recognized.

They should do that part regardless of LEED.

DSE Mobile

On Apr 17, 2013, at 6:13 PM, "Jason Kirchhoff" <jason.p.kirchhoff at gmail.com<mailto:jason.p.kirchhoff at gmail.com>> wrote:

I'm working on a project that involves an expansion and a major renovation of an existing building. My question relates to LEED modeling of the existing building under LEED-NC.

The issue is that the existing building is significantly over-ventilated. My team is involved in an energy retrofit of the existing structure and intends to bring the OA rate down significantly. However because of the equal vent rate requirement in Appendix-G, it seems like this won't lead to any energy credit. As I understand it, no matter what we drop the vent rate to (or even if we raised it), the proposed building will have to match and the ventilation improvement will go unrecognized.

In case that's not clear, say the current building has 10,000 cfm of OA, but we're going to drop that to 5,000 cfm with the new design.  This leads to significant heating and cooling savings. Can the baseline have 10,000 cfm because it's an existing building, or must it match under all circumstances?

Thanks,


Jason Kirchhoff
Technical Director
Energize Analytics
www.energizeanalytics.com<http://www.energizeanalytics.com>
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