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Old 04-24-2013, 09:29 PM   #1
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Bathroom Vent - Where To Exhaust It?


Current bathroom has no fan. I'm looking to install a new Panosonic one, but I'm not sure if I should exhaust it through the roof or on the side (right of the window)




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Old 04-24-2013, 11:02 PM   #2
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Bathroom Vent - Where To Exhaust It?


Yes, diffinately put an exhaust fan in the bathroom. IMO, going by your pic, I would prefer going through the roof option as opposed to going out by the right side of window option if you can. Either one would work, and everyone will have their own opinion as to what they think is best.

I do not know your location, it's not in your post. I assume by the bare trees and pine trees you are in a cold weather climate.

My reasoning is this; Properly installed for your geographical area (thinking of winter time), the roof vent option would be no issue at all. The moisture laden air coming from the bathroom will simply rise up and dissipate into the atmosphere. However, this option must be installed properly to work. Duct work properly insulated etc. Expect to pay a little more with going through the roof option.

Coming out by the the right side of window option, or 3 feet from your window area, whatever, you would be pumping the moisture laden air down, and we all know that hot air rises. Possibly going back into the soffit, causing moisture to get under your roof. However, this option would be less expensive and much easier. It's up to you, this is just my opinion.

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Old 04-24-2013, 11:28 PM   #3
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Bathroom Vent - Where To Exhaust It?


I'd avoid making any roof penetrations if f you can.
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Old 04-25-2013, 12:22 AM   #4
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Bathroom Vent - Where To Exhaust It?


I'd put it in the ceiling, next to the light---sink side, exhaust it out the closest gable end. Not side wall mounted.... far from the tub/shower (moisture source). Be sure to insulate/vapor barrier in unconditioned attic space, use straight pipe, pitch toward termination hood.

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Old 04-25-2013, 08:15 AM   #5
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Bathroom Vent - Where To Exhaust It?


Here is the floor plan. Note that I can't exhaust towards the bottom. But I could go up through the Aric and out above the bedroom closet.
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Old 04-25-2013, 10:41 AM   #6
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Bathroom Vent - Where To Exhaust It?


I think you're over thinking this. it's a bathroom exhaust fan, not a supply register. simply get a 4 inch flexible duct specific to an exhaust fan and run it over to the soffit and it's done. but make sure you have the right size fan, needs to be able to refresh 8 times per minute, I believe, so you need to know heigth, width and depth.
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Old 04-25-2013, 10:51 AM   #7
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Bathroom Vent - Where To Exhaust It?


that'll be total cubic feet of the restroom. and then there's the noise level of a fan, called sones, to think about.
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Old 04-27-2013, 09:52 PM   #8
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Bathroom Vent - Where To Exhaust It?


Sometimes you need them sones after a good weekend.
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Old 04-28-2013, 01:19 PM   #9
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Bathroom Vent - Where To Exhaust It?


Make sure if you vent right next to the window you keep it 3ft away atleast.

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