I didn t know they still use that type of return still though but it would make much more sense to at least sheet metal the sides of the joist and seal them so contaminants like wood mold and spiders and crap like that are not in the system.
How to install sheet metal joist panning.
Starting before return air trunk is installed.
Use as a run of duct usually to channel air back through the return air system.
As we look closer here s what we see in this house.
Position first section of thermo pan as follows.
Which i have as all i have is a rusty piece of sheet metal over the 2 joists and with those big box shaped vents.
Secure sides to bottom of joists by stapling every four inches print side out.
Install with sheet metal screws not included.
Is that a towel in there.
These panels can cost more to install that a traditional roof but in the long run are often a better value.
Can be cut to size to fit a variety of applications.
Center thermo pan between joists and at least 2 past top side of duct to provide a tight seal when final trunk is installed.
In this case it s big enough that there s even a joist running right through the middle.
All you need to do is install whichever material you choose to the bottom of the floor joists and then seal the seams.
What the installer did here was to screw a piece of sheet metal to the bottom of the joists and attach a duct to it to carry the air back to the hvac system.
Depending on the type of furnace in your home the plenum is secured to either the top of the furnace or over the supply air opening with sheet metal screws.
Who knows i know theres duct tape.
How to install joist panning installing return air duct panning is simple.
Seals the underside of a joist space.
Corrugated metal panels often called tin because in the past such panels were sometimes made of tin are typically steel or aluminum sheets that are used as a roofing material.
Some builders create pan joists by attaching a solid panning sheet material to the bottom of a floor joist to create a return air pathway.
If you use thermopan or ecofoil all you need to do is staple it right to the joists.
Width is equal to the distance of joist spacing which enables the panning to be nailed or screwed directly into the wood.
