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| What is the correct method for connecting flex duct (R-8) to a metal plenum? Mine were taped in place (metal duct tape) and my air handler has blown them off the metal flange. Should these be screwed in + the tape? The flex duct doesn't seem to have much to screw into.
Also, is a big zip tie OK to hold the insulation in place? We had our duct work replaced due to flooding last year and one of the connections has broken. I want to bring the company out to fix the problem but want to know the correct way to install so I can ensure a correct fix. Thanks! |
Follow-Up Postings:
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- Posted by energy_rater_la (My Page) on Mon, Jul 9, 12 at 16:34
| start collar mastic sealed to plenum. inner liner mastic sealed to start collar. insulation jacket and insulation brought in contact with plenum. mastic sealed insulation jacket to plenum. lock ties are often used to hole insulation jacket and insulation in place. either paint on mastic or mastic tape can be used. I use Hardcast brand 1402 mastic tape. foil tapes are not strong enough. just like best of luck. |
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| Looking @ it closer, I see a gray sticky material on the inside of the flex and the tape has a grey sticky backing (tape is metallic). It looks like they used the right materials but for some reason the duct still fell off (metal was dusty?). |
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- Posted by energy_rater_la (My Page) on Mon, Jul 9, 12 at 17:34
| inner liner connected to supply box, same install for plenum install don't know how to do multiple pics so outer liner pic to follow |
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- Posted by energy_rater_la (My Page) on Mon, Jul 9, 12 at 17:40
| and last. |
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