Al,
I think the issue of putting panels over an array is not simply "inadequate ventilation", but also creating a situation where frost might be more likely to form on the inside of the pipe. The way I had it explained to me, the UPC requires vents to go 10" above the roof line, and the Standard Plumbing code also requires that the penetration through the roof be upsized to minimize the impact of frost. I've always worked with plumbers to relocate the vents, which turned out to be easier and less expensive once we had done a few projects together. We used the Studor vents as well, which are a simple solution but require a little more planning I'd love to see if the vents make a hot spot on the panels - maybe they'd help shed snow more quickly. Isaac Opalinsky Message: 1 Date: Thu, 15 Dec 2011 14:31:10 -0500 From: Allen Frishman <amfr...@aeonsolar.com> To: re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] Vent Pipes under an array? Message-ID: <608da4f3-6859-4447-bfcd-de69e6d61...@aeonsolar.com> Content-Type: text/plain; charset="us-ascii" Wrenchers, My local JHA has recently decided that vents for anything other than fresh air are not allowed under the solar array. The ones that are causing me the biggest problem are the plumbing vent pipes as I have several projects with 10 or more pipes to deal with. Has anyone successfully proven that it is not a health problem to vent under the array since there is plenty of airflow between panels and on all 4 sides of the array? Other than extending the pipes through the array by leaving out panels, are there any other suggestions? My application is flat roofs with raised multiple row arrays (100+ solar panels) All feedback is appreciated. Al Frishman AeonSolar (917) 699-6641 - cell (888) 460-2867 www.aeonsolar.com
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