How to Install New Duct Work in Crawl SpaceRemove all the old duct work and dispose of it properly or according to your local zoning laws. Measure all the runs that you will need to …Hang the trunk line. This is the large shaft that comes directly off the furnace or air conditioner. Use the straps to hang the trunk line …Cut all the holes in the trunk line where they will exit and run to the floor mounts. You may not have had to remove the floor mounts, but …Clamp the farthest vent line into place. There will be clamps included in any duct work system. Tape around these clamps with the duct …See More….
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