I would like to use this cap with a 504 fan mounted vertically. i understand I need a 10 to 8 reducer. Does the damper in the 644 roof cap
eliminate the need for a damper built into the reducer ? (ex Broan 472).
Thank you for your question on the model 644 roof cap. Having a roof cap with a built-in damper is the best installation, but it does not hurt to also have a damper at the fan itself. Please contact the Technical Service Department at 800-637-1453 if you need further assistance.
Date published: 2015-09-15
Will this work with a powered bathroom exhaust vent going through a low slanted gable shingle roof?
I want to merge a few powered bathroom exhaust fans through this 644 roof cap. Will that work properly on a low slanted gable roof? Are there any issues I need to know about?
Thank you for your question on the model 644 roof cap. This roof cap is capable of venting 3-1/4” x 10” rectangular duct work or up to 8” round duct work. It can be used on slated roofs with a minimum of a 2/12 pitch. We do recommend that each ventilation fan have its own duct work.
Date published: 2014-02-19
What is the solution for installing caps on steel roofing?
Thank you for your question on the 644 roof cap. We would have to recommend that you contact your local steel roof manufacturer or expert in your area for their advice. They would be the best contact person to find out what you can use and what you would need to do.
Date published: 2017-11-08
which 40000 series will be good for the 644 roof cap?
Thank you for your question on the model 644 roof cap. The 644 roof cap is designed to fit any exhaust fan or range hood that requires 3-1/4" x 10" rectangular or up to 8" round duct. Please contact the Technical Service Department at 800-637-1453 if you need further assistance.
Date published: 2015-05-05
Broan model 644 Aluminum Roof Cap
1. I have a 6" round vent pipe. Will it work with this model? If so, how is it attached? 2. Photo shows that this model has a Black Epoxy paint finish....True?...False?
Thank you for your question on the model 644 aluminum roof cap. The 644 is designed to be used with 3-1/4” x 10” rectangular or up to 8” round duct work. The duct work will come up through the roof and stick up approximately 1” above roofing material. The 644 will attach to the roof over the top of the duct work. The duct work does not actually attach to the roof cap. The 644 has a back draft damper and bird screen. This unit is made from aluminum and has a natural aluminum finish. The Broan model 634M is our roof cap for 6" round duct. This may be a better option for you. For further assistance please contact the Technical Service Department at 800-637-1453.
Date published: 2013-11-08