4in flex duct
I am looking for some 4in flex duct like is used for the heat vents. I have found all types that are like dryer vents that have no insulation to a/c duct with too much insulation. Call me crazy but I ...
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In most RV's that do not have actual alum box ducting.
http://www.dwincorp.com/products/15/4-in-dia-X-25-foot-long-Premium-Flexible-Heat-Duct-4-X-25-SLP-10-
http://www.dwincorp.com/products/15/4-in-dia-X-25-foot-long-Premium-Flexible-Heat-Duct-4-X-25-SLP-10-
