I would advise replacing the flex with steel!! What if this stuff fails.How you gonna replace it.
just saw the vidio. Looks like the typical nc system. Looks like you may have a damper zone system from the control on the furnace.
you would IMHO do better and save more by ripping it all out and run two main trunk lines with flex take offs as short as possible to the registers
you can then bax in the trunks if you like
that nightmare srider system should never have passed inspection IMO
X2, I hate spiderweb duct systems, sometimes you have no choice but most of the time it can be ducted with trunk lines.
Originally Posted by tinknocker service tech
it's not a zoned system.
I might replace the flex with sheet metal tube before it gets mudded up.
DOE/Steven Winter Assoc has recently completed a study and built standards for spray foam insulating duct in attics. I attended a webinar where the author, Bill Zoeller presented their findings. It was fantastic:
Early adopters will need to be significantly involved in the process to insure quality, probably having to lead the contractors until these strategies and best practices for implementation trickle to the field.
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You can encapsulate unburried duct. It doesn't meet Challenge Home requirements so you wouldn't design this way, but apparently is a significant improvement for retrofit:
Here's my spray foam picture album for those interested.
Which makes more sense to you?
- turning your thermostat back and being uncomfortable. Maybe saving 5-10%
- leaving your thermostat where everyone is comfortable. Saving 30-70%
DO THE NUMBERS! Step on a HOMESCALE.
What is comfort? Well, it AIN'T just TEMPERATURE!
Energy Obese? An audit is the next step - go to BPI.org
, or RESNET
, and find an auditor near you.
I have done it for a few customers. The best time to have it done is during a major remodel. On one job the customer added 600 square feet and we reused his existing heat pump.
Originally Posted by newstudent
Spiral is my choice on the round stuff.Flex should be minimized as much as possible.