Excel Wall Thimble. insulation and Pipe question

[terryjd98]

I finally got my permit and all the parts came in at the stove store so picked them up and was getting everything lined up to know where to put in the wall thimble. Got to looking over the thimble and noticed that the first 8 inches that goes on the inside of the house has an air space between the insulation and where the pipe goes. On the end that goes outside it has insulation that you have to push the pipe through.
Now I thought from what I had read on here insulation was not suppose to touch the vent pipe and I thought this included the thimble. Is this just somekind of special insulation that the vent pipe can't catch on fire and also acts as insulation to keep any cold from comming in?
By the way for anybody who remembers my posts I was planning on doing a horizontal install but the fire chief would not pass that kind of installation because I was going to be within 2 inches of my outside central air unit which he considered an air vent. Now I am putting a T behind the stove, 4 feet up the wall, a 90, then out the wall 18 inches, 4 inches for the 2x4 insulated wall I am building inside the stone wall then 14 inches of stone wall, then my termination 12 inches from outside of the house.
Any comments about how these parts are suppose to go together would be appericated. The instructions that came with the kit are pretty clear on how to install but doesn't mention the insulation on the inside of the thimble but does say not to let any insulation touch any vent pipe in different setups.

 

[abbdog]

I'm running mine on setting 3(goes to 5) and the pipe through the thimble is only warm.Just make sure theres no joints inside it.I pushed the insulation away when i put it in.H depot had fire proof foam to fill the gap but i decided not to use it.

 

[BignBeefy]

On my excel pipe system,I worried about the insulation too contacting the pipe. I pushed it back into one half of the thimble and then slid the other half on. I had no contacting insulation then. They have a site,email them or put a match to it and see if it burns. I guess that would prove how hot it could take LOL


They say the excel is the best and you CAN have a joint in the thimble with their system. Search for excel here and there are posts about it

 

[terryjd98]

I'm running mine on setting 3(goes to 5) and the pipe through the thimble is only warm.Just make sure theres no joints inside it.I pushed the insulation away when i put it in.H depot had fire proof foam to fill the gap but i decided not to use it.

On my excel pipe system,I worried about the insulation too contacting the pipe. I pushed it back into one half of the thimble and then slid the other half on. I had no contacting insulation then. They have a site,email them or put a match to it and see if it burns. I guess that would prove how hot it could take LOL
They say the excel is the best and you CAN have a joint in the thimble with their system. Search for excel here and there are posts about it

Hi abbdog, sounds like the pipe does not get too hot, thats good to hear. From the directions I read on the Excel it said its ok to have a joint inside the thimble but am not going to, don't like that idea, a streight run of pipe makes more sense to me. The way the thimble is made a person would have to take the insulation out to not have any contact inside the thimble. the outside part of the thimble is sure packed.

Hey BignBeefy I seached the excel site but never seen the answer to my question. Did a search on this site but never came up with an answer, just looked like people with the same concerns I had lol. Might have to email the makers of Excel and try to find out for sure. I did call the stove store where I bought everything and they said to just push the pipe through. Only problem with that is you never know if your talking to somebody that knows what they are talking about or not.
From the directions it sure reads like you just push the pipe through and the insulation goes right to and around the end of the thimble on the outside. Maybe a match put to a piece of the insulation would tell lol.
I will have the weekend to think about it anyways I think. Going to start knocking a hole in the 14 inch flat stone wall, should be a hell of a size by the time I make a hole big enough for the thimble to go though, figure I will probably have to do some cementing in the hole to make it smaller so the thimble is close to fitting.
Thanks for the replies.

 

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there should be no insulation in the area of the thimble as you should be framing above and below the thimble as a firestop/ way to anchor the thimble itself to the wall

 

[terryjd98]

there should be no insulation in the area of the thimble as you should be framing above and below the thimble as a firestop/ way to anchor the thimble itself to the wall

Your right there should be no insuation in the area of the thimble. What the problem is the thimble itself comes packed with insulation. This insulation extends to the outside end of the wall thimble and has an opening in the insulation for the pipe pass through. Just seemed strange that you are not suppose to have insulation touching the pipe but they put insulation in the wall thimble.
I have read all I can on it so far and best I can make out is this must be somekind of fire poof insulation. Even if you used the thimble to the smallest it would go together the pipe would still go through the insulatin at the outside end of the thimble.