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Well I just ran headlong into AB 970, the California Engery Bill. First it was the Low-E windows, now they are demanding before I get my permit on a 400 sq ft room addition, I have to do “DUCT SEALING”. Damn if I can find anyone in Southern California who does this…Anyone got any info on this? Sounds like snake oil to me…Steve.
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Prescriptive codes don't address the connection at less common angles, so base the connection off more typical ones using bolts, structural screws, blocking, and steel tension ties.
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actually.. relatively easy.. you use a duct seal mastic and a brush..
*Mike, Thanks, But how do you get it certified? I cannot figure out how, reading the "rules" only confuses me more. The code talks about a inspector and that they should be certified...but they don't tell how. There are companys that use a technique called aresol, and thats approved, Web sites call out $600+ to do the work but nobody around here does it. I'd rather do it myself but...Whats nuts is that the HVAC system in this house is almost new. Thanks, Steve.PS Mike are you close to thaw up there? Yesterday was a drag here, 78 degrees, I was baking.
*Idea #1 - Go back to the original installation company and ask them why they forgot to seal the ductwork. Insist they come back and finish the job properly, it's already paid for.Idea #2 - If #1 doesn't get you anywhere, see if you can get a look at a mastic'd installation, get a pail of mastic and a brush and smear it liberally around every place that was joined and tell the permitting folks that it was already in place, come out and look if you want.The technique is far from rocket science requirements and all you are doing is eliminating air leakage from mechanical fastenings.