Bathroom Exhaust Fan Ductwork

Shown at above right is flexible metal exhaust fan ductwork.

Zalman cooling fan. If you dont have access to an external vent but still want to improve circulation and air quality consider a duct free bathroom exhaust fan. Surprisingly bathroom fans are not required by some building codes. 1 16 of over 4000 results for bathroom exhaust fan duct broan nutone 682 duct free ventilation fan white square ceiling or wall exhaust fan with plastic grille.

The bathroom exhaust ventilation fan disperses air through an opening in the fan housing which is usually 3 inches in diameter and ideally faces in the direction of the ventilation system outlet. 41 out of 5 stars 265. For new construction you must size your duct venting the same as that on the opening at the back of your new bathroom exhaust fan.

Bathroom code does address the issue of moving odor and moisture laden air from the bathroom to the outside. All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans. The installation shown is too long and should have been insulated.

The reason the duct vent opening size and the actual exhaust duct piping size need to be matched up perfectly is so that your new exhaust fan will operate efficiently and with the least amount of excess noise. Flexible metallic exhaust fan ductwork. Get it as soon as wed sep 30.

More buying choices 2301 25 used new offers. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. 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.

Free shipping by amazon. See table m15062 there are other allowances for exhausting distances up to 3 elbows etc. Likewise the code requires a minimum of 4 flex or smooth duct for exhausting up to 50 cfm and a minimum of 4 metal smooth or 5 flex duct for exhausting 80 cfm and 4 smooth nor 5 flex is not allowed for 100 cfm.

The broan 682 utilizes a fan to produce air movement and a charcoal filter to absorb odors. Insulate the bathroom exhaust vent fan ducts. This material is more smooth surfaced than the plastic product shown at above left and by its flexibility can eliminate the need to install many elbows in the system.

Our bath vent fan duct installation photo shows use of solid metal 4 ductwork conducting the fan exhaust to an outdoor soffit under a cathedral ceiling roof. Bathroom vent fan ductwork insulation. In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover.