How to make transitions from your new furnace to old plenum and from cold air boot with hand tools in the example above i took a hypothetical furnace and plenum and made a transition.
How to make a sheet metal transition for a furnace.
The kits contain sheet metal pieces and an instructional dvd video to show you how to make sheet metal transitions.
This can be smaller than shown in the image.
Start with a rectangle with fillets in the corners and a gap in one side.
Make an offset plane to represent the length of the transition.
A transition can also be created to adapt a return air plenum when installing an air cleaner.
A transition between a furnace and plenum you can purchase below.
In the picture on the left you can see a real furnace plenum and cold air drop.
Open a sketch on the offset plane.
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The gap is for the sides of the flat sheet.
How exciting it is to install your equipment in my home using a dvd reading the instructions and to have an operating 2 stage furnace ac evaporator coil honeywell whole house filter supply transition and honeywell touch screen programmable thermostat.