I am installing a 48″ range hood in a kitchen with an 8′ ceiling. The hood insert is in a custom cabinet. The fit between the top of the hood insert and the 10″ round vent duct on the exterior wall is too tight for a 90-degree elbow duct — in fact, the top of the insert is actually a couple of inches above the bottom edge of the exterior duct.
I’m thinking of building a 12″ plenum box out of plywood to connect the two, and sealing it to the duct opening and the hood insert with silicone. Wood is a lot easier for me to work with than sheet metal. Is there any hazard or other reason not to do this? Should I line the box with sheet metal, or is this unnecessary?
Replies
If it were me I'd take the dimensions you need to a sheet metal fabricator and have them make the box for you. Also, your HVAC supply may have this as a stock item if not to strange a dimension.
If you can't get the sheet metal fabrication, then I'd definately go with lining the plywood box with sheet metal.
Regards,
Roger
all I can think of is higher buildup of grease in there. you might want to line with sheet metal
Ductape can fix EVERYTHING!!!