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Old 08-13-2010, 12:32 AM   #1
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Bathroom Exhaust Fan, Outside Ducting


Hi,
I'm installing a bathroom exhaust fan/light over a shower and I'll run a duct through an exterior wall. This is a ground floor bath in a two story home. The fan/light is a Broan 744SFL rated for use above showers, as long as it is GFCI protected. The duct will be short, maybe 2 - 3 feet, 4" diameter.

Does anyone know if there are restrictions on how far from a door or window the duct can be terminated? I think there is some restriction on placement of the termination point, wall cap. I thought it was 3 feet from any opening so there is less of a chance that expelled air will reenter the home.

Thanks.
RM575

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Old 09-01-2010, 06:15 AM   #2
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Bathroom Exhaust Fan, Outside Ducting


I think code is 4 feet.

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