Installing Trunk Line In Unfinished Attic

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Installing trunk line in unfinished attic.

Nec 2008 394 12 uses not permitted. 5 hollow spaces of walls ceilings and attics where such spaces are insulated by loose rolled or foamed inplace insulating material that envelops the conductors. The upstairs i sized a duct for the amount of supply air coming into the basement and ran it from the main return trunk down to the floor near the middle of the basement just like upstairs supplies are near the. Locate a wall stud at the desired vacuum system power unit location adjacent to an electrical outlet if possible.

A couple of years ago i even wrote an article about whether or not flex duct should be banned. For attic and crawl space installations many installers find it practical and easier to use working boards laid over the open joists or on the ground. The basic rules of the game however are the same whether you re. The most popular way seems to be before pipe installation in new construction and during pipe installation in existing construction.

Installing ductwork for heating and air conditioning is a bit like putting together a huge three dimensional jigsaw puzzle. Another useful tip is to run a sprinkler on the roof during installation to keep the attic temperature down. Attach the bottom of the trunk at an angle hammering into place. Hammer the ends of the metal to attach the pieces together later seal with sealant.

My answer was no but that we need better quality control. Concealed knob and tube wiring shall not be used in the following. The trunk line runs horizontally through the attic from the power unit to the furthest inlet location. Use the crimpers if you have to cut the pipe.

Branch lines spread throughout the attic connecting the trunk line to the inlet tubing. The intake and exhaust tubing the only exposed tubing in the installation run up the garage wall and into the attic. Attach trunk line to wood using 1 25 screws use two for both sides but do not over tighten. I ve written a lot about duct problems especially those in flex duct because they re so abundant.

These are 16 inch 406mm wide plywood sheets 8 foot 2 4 m long.