cut hole in aluminum siding for bathroom vent fan

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Old 10-25-17, 11:12 AM
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cut hole in aluminum siding for bathroom vent fan

My house has aluminum siding. I want to install a bathroom vent fan that vents to the exterior of the house, straight through the wall. Once I cut the hole for the vent, what's the proper way to finish up the hole so the siding remains waterproof?
 
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Old 10-25-17, 12:13 PM
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A ceiling mount that vents out or a thru the wall mount ?

This is the wall mount that I use.
Comes as a complete kit with the outside hood and damper. The hood gets attached and weatherproofed to the siding.
Panasonic FV-08WQ1 - Whisper - Wall Mounted Fan
 
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Old 10-25-17, 01:02 PM
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Thanks for the reply! It will be on a wall, an exterior wall. Right above the shower, direct to the outside.
 
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Old 10-25-17, 07:06 PM
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If possible I would pick a spot that is centered on a row of siding... so if you have 7" siding, for example, drill your hole 3 1/2" from the top or bottom edge of a row... so that when you install your vent you can just caulk around it without having to worry about the vent sitting over 2 different pieces of lap siding.

If you have no overhang (wide soffit) you would obviously need to use a vent fan that is louvered, or rain will get driven right into the fan.
 
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Old 10-25-17, 09:02 PM
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Yes.... sidewall venting can be an issue. One good thing about the Panasonic fan is it comes with a downwards pointing vent cap.
 
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Old 10-25-17, 10:17 PM
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How about a siding block?
 
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Old 10-26-17, 06:53 AM
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Just not a great plan.
What's above this area?
Is there a second story, or attic?
 
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