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Old 04-06-2012, 02:28 AM   #1
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OTR Microwave Ducting


Hi, thanks for your time. I tried searching for "exhaust hood duct" and read thru the ~20 or so threads. I am attempting to install an OTR Microwave/Exhaust and had some questions about the ducting.
The OTR Microwave has a built in damper.
I have 2- 90 Elbows and the semi rigid ducting show in the pictures (7" diameter). I also have a 3.25"x 10" to 7" adapter.
Pics:
https://picasaweb.google.com/Jim.Mac...eat=directlink

There is a wooden beam about 1" from the duct if it comes straight down from the roof vent, and I am worried that the exhausting air might pose a fire hazard. 1. Will this be a hazard if I install the ducting as I had planned?

2. If it is a hazard, how should the ducting be run instead?

Thanks for your time!

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Old 04-06-2012, 10:05 AM   #2
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OTR Microwave Ducting


i am no pro. but it looks to me, that if that vent gets hot enough to be a fire hazard = that vent is the least of your problems. that vent, when in typical use, will not get hot enough that you couldn't touch it.

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Old 04-06-2012, 10:41 AM   #3
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OTR Microwave Ducting


The heat required to start a fire with any of that material will never be reached with the duct work your installing.
Non issue IMO.
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