Insulated Duct For Bathroom Exhaust Fan

Kitchen vent fans require metal ductwork for fire safety.

Insulated duct for bathroom exhaust fan.

I recently installed a bathroom exhaust fan. Insulating around a bathroom exhaust fan it s a diy project and if you love to do some small diy projects probably you already have all the things you need. This additional insulation provides greater thermal efficiency to save energy. Ac infinity flexible 4 inch aluminum ducting heavy duty four layer protection 8 feet long for heating cooling ventilation and exhaust 4 5 out of 5 stars 264 terrabloom 4 air duct 8 ft long flexible ducting with 2 clamps 3 layer hvac ventilation air hose great for grow tents green houses house vent register lines 4 5 out of 5 stars 329.

The building code requires a bathroom exhaust fan to vent outside the building so installation of a new bathroom fan necessarily involves installation of ductwork. The duct has r6 insulation which contains 33 more insulation than the standard r4 2 product. Solid metal vs flex duct for kitchen and bath vent fans. Insulated flexible duct r6 silver jacket is used in standard heating and air conditioning hvac systems and some venting applications.

The duct runs in my attic above the bathroom ceiling two story home. The common solutions to this ice problem are to use a higher powered fan use a larger diameter shorter duct run and wrap the pipe with better duct insulation. You can also run the fan longer at least 10 to 15 minutes after showering is a good baseline so the ice melts or doesn t freeze in the first place. This is non usable space and it is well ventilated with ridge and soffit ventilation so it does get cold in the winter.

This is much easier to do if you have attic access because if you don t you usually have to remove some ceiling drywall and run the ducts along a joist. Bathroom vent fan ductwork insulation insulate the bathroom exhaust vent fan ducts. For optimum venting use insulated 4 or larger metal ductwork rather than flexduct that may sag giving you areas that collect water and risk leaking into a ceiling below. In un conditioned space such as an attic where otherwise your fan duct will be exposed to cold attic air in winter use insulated solid metal ducting or insulated flex duct.

I used flexible 4 aluminum duct to the exhaust damper on the roof.