Start with a rectangle with fillets in the corners and a gap in one side.
How to make a sheet metal transition for a furnace.
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.
A sheet metal transition is a custom fabricated duct to connect a new furnace or air hander to existing ductwork.
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The rounded corners are to help accommodate the transition to the circle.
Make an offset plane to represent the length of the transition.
The kits contain sheet metal pieces and an instructional dvd video to show you how to make sheet metal transitions.
Open a sketch on the offset plane.
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A transition can also be created to adapt a return air plenum when installing an air cleaner.
In the picture on the left you can see a real furnace plenum and cold air drop.
The gap is for the sides of the flat sheet.