Go back into the attic to install the duct pipe. The best exhaust fan venting is through smooth, rigid ducts with taped and screwed joints. But when that isn't possible, metallic flexible duct ...

install plastic exhaust grills in each bathroom ceiling. Run 4-in. flexible ductwork from the grills to the inline fan. Connect each duct to a "Y" connector, then secure it to the inline fan.

The ANSI-recognized national standard for residential HVAC duct design will help you design a duct system in less time. The ANSI-recognized national standard for residential HVAC duct design will help ...

National Ventilation has designed and supplied a whole-house ventilation system to an architect-built five-bedroom eco home ...