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Seems to take the vent forever to clear shower vapor from room. I purchased a vent that had a good rating. It is vented to the outside. How do I know if it is working properly and actually venting to the outside?

Tester101
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Sandy
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    Is it a passive vent, or does it have a fan? – Johnny Oct 30 '13 at 16:19
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    Need more details. Is there a fan? Can you hear it spinning? – Chris Cudmore Oct 30 '13 at 16:59
  • Rip one square of toilet paper, and hold it up to the intake while the fan is on. If the paper sticks to the vent, it's working. Remember, a ventilation fan has to be [sized properly for the room](http://diy.stackexchange.com/a/21576/33). – Tester101 Oct 30 '13 at 17:08
  • How big is your bathroom and what vent/fan is installed? – UnhandledExcepSean Oct 30 '13 at 20:00
  • I can tell if my upstairs vent is on by looking at the grill cover's slats on outside of the house: they'll be sticking out. Also, when I bought my last bathroom ceiling fan I checked online and learned about the cubic feet per minute required per square foot of bathroom space, and bought a fan that could move that much air. – getterdun Nov 01 '13 at 01:22
  • The vent to the outside could also be an issue. Is it clogged? Does the vent on the outside open correctly? Is the size of the pipe big enough? Length, duct type (flex vs rigid) and number of elbows also effect the efficiency of the fan, eg, each [adjustable elbow adds the equivalent of 15' to the pipe length](http://inspectapedia.com/BestPractices/Table6-13.jpg). – gregmac Nov 01 '13 at 19:04

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