Tried to respond to your PM, but couldn't.
Originally Posted by eazis1
Question. i have a carpet air mover that blows out cold air, it has a squirrell cage inside. couldn't I use that with a filter or do I need a different type of squirrel cage. If so what is it called
Yes, you can absolutely use that. A squirrell cage is a squirrell cage. The key is to be able to isolate the output from the input and have filters on both sides of it. I would put two filters on the intake and one on the output.