There aren't any. There are a few standards that have infiltration baselines. I believe the HERS (Home Energy Rating System) uses an infiltration baseline of about 0.35-0.4 ACH, and there are some other standards out there. Of course, some people will argue that the building should be positively pressurized so that there will be no infiltration. I don't know of anyone that has gotten credit for LEED EA C1 for infiltration, but in my opinion, this is a huge Appendix G oversight. My suggestion is to apply for a CIR and suggest an infiltration baseline. If the building is 100% renovation, the baseline could be established using a blower door test on the original building, or you could come up with another reasonable, established baseline.<br>
<br>--<br>Karen<br><br><div class="gmail_quote">On Tue, Mar 10, 2009 at 10:16 AM, Mark Prince <span dir="ltr"><<a href="mailto:mprince@aeieng.com">mprince@aeieng.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hello,<br>
<br>
I'm involved with a project that is considering pursuing LEED certification. It is a remodel/renovation of an existing office building.<br>
<br>
The existing office building has quite a bit of infiltration. As part of the renovation process, the exterior walls are being sprayed with a foam insulation that will significantly reduce this infiltration. Someone has asked the question, if we can take credit for this reduction in infiltration. In other words, they want to model the Appendix G baseline building with the old infiltration rate and model the proposed building with the new infiltration rate. This will show a good amount of energy cost savings.<br>
<br>
Is this acceptable? I'm having a difficult time finding any reference to infiltration rates within Appendix G.<br>
<br>
Thanks,<br>
<br>
Mark Prince<br>
Affiliated Engineers<br>
5802 Research Park Blvd.<br>
Madison, WI 53719<br>
(608) 441-6668<br>
<a href="mailto:mprince@aeieng.com">mprince@aeieng.com</a><br>
<br>
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