I'm trying to find the venting parts (ductwork) for our OTR microwave. I want to vent it through the wall so it would be a very short piece of duct (8" maybe) plus the wall cap for the exterior. The duct opening needs to be 3.25" x 10" to fit the microwave opening. The instructions have a dandy little illistration of one but fails to tell you where to get it.

I have tried Lowe's, Home Depot, Ace and a HVAC & plumbing supply house. Can't find it on the internet, either.

If anyone can help, I'd really appreciate it.

Thanks.

Looking for that?: Browsing OVAL (http://www.audubonsupply.com/browse.cfm/2,176.html)

Thanks for the reply, but I don't think that would work. I need the 3.25 x 10 rectangle. I don't get what the comparison is all about at that site.

But looking through their site, I think I found what I needed http://www.audubonsupply.com/browse.cfm/4,6704.html

Thanks again.