Customer Reviews for Master Flow 15 in. Ductboard Triangular Terminal Box

Too thick to use start collar bought from store. I just folded tabs down and went from the inside out. Taped it with elastic type 1 tape. Works just fine.

It's made with durable quality material. Some assembly is required with met tape not included.

worked great for what I needed, glad it was not assembled would have been hard to use, worked best for me to assemble it myself for what for what I needed ,cheaper than buying duct board and a cutting tool.

Good size replacement the square type

I found the item to work very well for what I purchased it for.

Just what I needed. Not available in store, had to order and wait.

Some assembly, not hard

Worked as a wye for three 7" ducts.

Perfect went together easily.

I agree with previous reviews. The triangle pieces don't have vapor barrier extensions, and when bending the triangle piece closed, you must cut the inner insulation so that the outer vapor barriers of the open ends meet. That might leave some uninsulated space inside if you don't cut it exactly right. The ends are cut at 90 degrees, not at the proper angle for the open ends of the triangle to meet when folded.

Rating provided by a verified purchaser

These are JUNK.......not built right, no vapor barrier extensions to secure..... I should charge H depot for wasting my time....

YOU MUST BUILD THIS YOURSELF - NOT ASSEMBLED ! ! ! I should have read the extremely fine details that were hidden from plain view. You must fold this box together and then tape it closed. I wouldn't usually complain about this, but I also had to cut down the inside of the bends as well. The angles were cut to be 90 degrees, not made for a triangle.

Outstanding product, quality exceeded expectation. I've bought 4 of these boxes and would buy again. Excellent price.

Built the box in about 10 minutes. Then cut in my take offs needed for my project. Good R-value to the box and forms a nice air tite box