Connect the end of the flex duct onto the circular end of the rigid duct with self tapping duct screws.
Moving ductwork in attic.
You would or should also weatherize that attic and make it part of the conditioned space.
According to nrel researchers david roberts and jon winkler moving the ducts from a vented attic to a new location inside the conditioned space will reduce electricity used for cooling by 15 to 20 and will reduce the size of the needed air conditioning equipment by 0 5 to 1 ton.
However unless you have new construction is highly doubtful that you can find an alternative.
The attic ductwork is flex duct work.
I chose unfaced batt type so that it would stay in place.
Strap the flex duct to the attic framing at 4 foot.
Insulate and air seal the floor with open cell foam put ductwork and mechanicals in the attic install a radiant barrier and mastic seal the ducts.
Locate the screw sticking up through the ceiling and mark this with tape for reference.
Map out the current a c ductwork by going up into the attic or crawl space.
Strap ducts out of insulation with 3 ductstraps per specifications.
It was new when the ac was put in 7 years ago.
House flipping brothers dave and rich show you how to move and install ductwork.
You might think you have every single hole sealed but even so new leaks can occur without you even knowing about it.
I believe that moving ducts out of the hostile temperature environment of the attic is obvious.
I vote for the attic.
Tips for running ductwork through the attic ideally in a passively vented system the attic is completely sealed from the living space by gypsum board and caulking along all ceiling joints creating an airtight seal.
Seal the connection with duct tape.
If so you could put the new system upstairs in a closet and have all the duct work in the attic.
Going over every inch of ductwork is a laborious process especially when a section of ductwork is in a location that s difficult to reach.
Working on the lake house they want to put a new window between the two win.
Lentz suggested moving the ductwork to one side of the basement which on paper of.
While the attic install isn t ideal it beats the problems that come with ducts.
Recently i had another hvac company come out and put in a new bathroom vent and they told me they believed the duct work was full of water.
Also attic ducts often leak.
Instead i covered my attic ducts with insulation.
Seal supply boxes with mastic.
I called out the original hvac company and they took a look and said they saw no water.