Do they make special insulation or anything for the pass through box? Seems to me like it would get awfully cold and wick heat out of the room (Assuming the stove isnt running). Thoughts?
NOTE: To reduce cold air infiltration into the dwelling you
can install the optional Universal Shielding Insulation (JUSI)
into the Cathedral Support Box. See separate installation
instructions packaged with the JUSI.
A little googling and it brings me to a thread here!
https://www.hearth.com/talk/threads/selkirk-supervent-installation-begins.75341/
Looks like the jusi has some form of insulation touching the class a chimney
View attachment 116360
Mine is too shallow to use the jusi but i wonder if i could stuff that insulation inbetween the box and the class a.
Mine still looks like this:
I really need to get up there and seal it off. I used a lot of barn tin inside, so I think I will insulate the opening, then build a barn tin chase around the flue pipe.
Barn tin:
It looks and feels just like fiberglass. It resembles roxul in no way. We have lots of both, rarely use the JUSI.This is a grey area. If you want to be squeaky right, get the mfg. insulation and keep the receipt. That way you are documented with an approved insulation. It's probably just roxul, but it is best not to have any area of dispute with the insurance co or inspecting authority.
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