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USI 4-in Replacement Duct Adaptor for Bathroom Exhaust Fans, Plastic

USI BF-A4P
SKU USI-BFA4P
USI Electric manufactures a line of bath fans and bath fan accessories that are ideal for moving air and pulling out moisture in personal or public restrooms. They maintain a normal humidity level and prevent mold, mildew, and odors from forming.
USI 4-in Replacement Duct Adaptor for Bathroom Exhaust Fans, Plastic

Image may not depict product actual color, inclusions or accessories

USI Electric manufactures a line of bath fans and bath fan accessories that are ideal for moving air and pulling out moisture in personal or public restrooms. They maintain a normal humidity level and prevent mold, mildew, and odors from forming.

USI Electric Plastic Duct Adaptor Replacement Part for Bath Fans, 4-Inch Duct features:

  • Designed for use with USI bathroom exhaust fans that connect to 4-inch ducts.
  • This part replaces worn or broken duct adaptor on BF-504, BF-504L, BF-504LF, BF-504BA, BF-704, BF-704L, BF-704LF, BF-704LH, BF-704HB, BF-704BA and BF-704L models.

USI BF-A4P Description

USI Electric Plastic Duct Adaptor Replacement Part for Bath Fans, 4-Inch Duct features:

  • Designed for use with USI bathroom exhaust fans that connect to 4-inch ducts.
  • This part replaces worn or broken duct adaptor on BF-504, BF-504L, BF-504LF, BF-504BA, BF-704, BF-704L, BF-704LF, BF-704LH, BF-704HB, BF-704BA and BF-704L models.
Unlock FREE Shipping at $99 by just signing in!
Ships free on orders over $500 of eligible items to all guests.
Free Shipping Eligible
$1.03Each
In Stock-Ships by 04/27/2026

Product Specifications

Part NumberBF-A4P
Color / FinishWhite
Warranty3 Yrs
Weight31.00-lb

Manufacturer Description

Model BF-A4P Bath Fan Accessory

  • Plastic Duct Adaptor Replacement Part is designed for use with USI bathroom exhaust fans
  • Connects to 4-inch ducts
  • Use this part to replace the worn or broken duct adaptor on your bath fan
  • Adaptor can be used with models BF-504, BF-504L, BF-504LF, BF-504BA, BF-704, BF-704L, BF-704LF, BF-704LH, BF-704HB, BF-704BA and BF-704L
  • Bathroom exhaust fans by USI Electric combine high function with practical design to keep air moving and effectively pull out moisture
Prop65
Important PROP 65 InformationWarning: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov. to CA residents.
USI Electric manufactures a line of bath fans and bath fan accessories that are ideal for moving air and pulling out moisture in personal or public restrooms. They maintain a normal humidity level and prevent mold, mildew, and odors from forming.
USI 4-in Replacement Duct Adaptor for Bathroom Exhaust Fans, Plastic
Unlock FREE Shipping at $99 by just signing in!
Ships free on orders over $500 of eligible items to all guests.
Free Shipping Eligible
$1.03Each
In Stock-Ships by 04/27/2026

USI BF-A4P Description

USI Electric Plastic Duct Adaptor Replacement Part for Bath Fans, 4-Inch Duct features:

  • Designed for use with USI bathroom exhaust fans that connect to 4-inch ducts.
  • This part replaces worn or broken duct adaptor on BF-504, BF-504L, BF-504LF, BF-504BA, BF-704, BF-704L, BF-704LF, BF-704LH, BF-704HB, BF-704BA and BF-704L models.

Product Specifications

Part NumberBF-A4P
Color / FinishWhite
Warranty3 Yrs
Weight31.00-lb

Manufacturer Description

Model BF-A4P Bath Fan Accessory

  • Plastic Duct Adaptor Replacement Part is designed for use with USI bathroom exhaust fans
  • Connects to 4-inch ducts
  • Use this part to replace the worn or broken duct adaptor on your bath fan
  • Adaptor can be used with models BF-504, BF-504L, BF-504LF, BF-504BA, BF-704, BF-704L, BF-704LF, BF-704LH, BF-704HB, BF-704BA and BF-704L
  • Bathroom exhaust fans by USI Electric combine high function with practical design to keep air moving and effectively pull out moisture
Prop65
Important PROP 65 InformationWarning: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov. to CA residents.

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