Flexible Or Rigid Duct For Bathroom Fan

Rigid pipe either metal or pvc won t collect debris inside and block air flow.

Heavy duty ul 2158a flexible round aluminum transition pipe ex mtf 496 the home depot you may need a reducing collar depending on the size outlet for your fan and the vent cover where it exits the building. Little thought is really given to these fans in most homes today. Flexible aluminum duct is easier to use than rigid duct and can bend around corners without the need to install extra fittings but some local codes won t allow it so be sure to check. Using spray foam to seal around a bathroom vent fan mar 12 2014 john said.

If it s a luxury project they ll splurge for the flex aluminum instead of the plastic kind. Smooth metal duct also maximizes vent fan airflow performance. You will want to use a semi rigid metal flexible duct like this speedi products 4 in. They are often undersized for a given bathroom and poorly located too.

But flex duct and insulated flex duct are approved by bath vent fan manufacturers are very widely used for fan venting because of its ease of installation and low cost as we describe next.