- Nov 1, 2012
- 1
I have a nc30 that I want to install in my basement. My only option is to go through my poured concrete wall. My question is do I need to use a wall thimble or just use a piece of class A pipe to go through the concrete? I'm going to be buying a Supervent through the wall kit so I'll have a thimble. Didn't know if it was necessary to core drill a bigger hole for the thimble due to being a non combustible. I think 8" is the biggest core bit the rental place has, I need a 10" for the thimble don't I? Thanks for any help!