Any thoughts / experience with insulating material for a 4 inch diamter tubing used in a bathroom exhaust fan installation? The tubing shall be in an attic crawl space in a ranch style house located on Long Island, NY (typical low and high temperatrures: 0F and 100F degrees).
I am wondering if pipe insulation or batt fiberglass insualtion should be used in this application ?
Is Owens-Corning Fiberglass Duct Wrap