Air Ducts

[Twentyover]

OK, I'm thinking about how to effectively duct air in a confined and winding space, and have a question. If this needs to be posted elsewhere, mods, please move it to where you think it's a better fit.

OK, I need to duct air around and about confined spaces. Rather than using convoluted bellows tubing, I'm wondering if the following would work.

Generate a cardboard duct/template to fit the planned air path. Glue/tape/secure 3 sides of the 4 sided rectangular duct (or half the round duct. Since this is essentially a non-load bearing deal, paint fiberglass resin on the inside surfaces of the template (probably duct taped together) when dry, assemble the opposing side, and paint the resin on the exterior surface. Of a region needs additional structure, use some fibrglass cloth in the region to reinforce the area. The intent is to used the corrugated structure of the carboard and the stiffened outer skin to provide most of the small load bearing requirements.

Any fiberglass guys care to comment?

Thanks