Help Needed for wall thimble installation

[ETPHONE]

I am finally ready to install my englander stove in my basement. I purchased the 3" simpson dura vent kit. I would like to come off the tee and run the 3" pipe straight up through my basement ceiling which is sheetrocked. Once I have the pipe over the ceiling and positoned between the the first floor floor joist I would place a 90 deree bend an thenrun the pipe out over my sill plate through my sheeting. My question is where should I install the wall thimble. I have seen some pictures of the installation and the wall thimble is postioned at the eexterior wall which makes sense but do I need an additional thimble in postion where the 3" pipe goes through the ceiling?

Can I install the thimble as followed also? Where the 3" pipe goes through the basement ceiling, I can place the interior black side of the thimble flush with the ceiling then install a 90 degree bend then my required horizontal length of pipe to vent out to the side of my house. On the exterior of the house I would place the second half of the thimble in place?

Is the outside air kit really necessary? I have read in the MA code book that outside air is not required if the total volume of space in cubic feet(where the unit is being installed) is equal the the btu output of the unit.

LAstly is there a problem in placing two bend in the exhaust lines to offset the stove so that I can place it in my space symetrically?

 

[stoveguy2esw]

first question: you will need to check with simpson on the "divided thimble" my gut tells me that you will not want to do that , it is likely a code violation elk could tell ya for sure but a pipe hidden in a wall with no enclosure by non-combustible shielding with proper clearance is taboo.

as for outside air , it is imperitive that it is installed. 2 reasons, the unit has vacuum safety switches that could be affected by the negative pressure you will have if it is not installed, and secondly , if you have a power failure that same negative pressure plus the loss of forced extraction of the smoke means that you will definately have a house full of smoke. with outside air you will not only negate the negative pressure that will reduce efficiency , but you will allow the unit to draft naturally in the event of power failure or unplanned shutdown and should not have smoke intrusion. bottom line , install the outside air kit. as for the code issue with the first question i await elk to help me out , but IMHO it aint a good thing to have unprotected pipe inside a wall

 

[GVA]

ETPHONE where is youre home??????????????
You said MASS.....
Anyway the inspectors usually rely on the manual for the specs and since the Englanders say the use of outside air is mandatory you should install the outside air, Mike will give you the rest of the specifics.....

 

[ETPHONE]

Thanks for the fast replythis site is the best. How about this as an alternative solution, do you think I could get away with framing the area between the floor joist with sheetrock that way the pipe is in open space with the rest of the room and not enclosed. To further protect the area between the floor joist I could get some sheet metel and cover the sheetrock in the space with it? I have more than enough space where I would have at all times more than 5" of clearance around the flue at all times just like the wall thimble.

Where the flue penatrates through the ceiling, could I get away with installing a metal grate with square openings in it that way it would still make the space open but at the same time I have a more attractive ceiling.

 

[stoveguy2esw]

welcome to hearth , where the pro's play (lol thats cheezy but accurate) as for your question , im not sure , would bebetter definately than inside the wall, im hoping brother ELK will chime in , he would be able to give code related answer, he is a code inspector in mass so he should be able to guide you on that better than i, as for function of the unit and technical questions , aside from local code issues , im your man. let me know if i can help you in those areas

by the way , thanks for selecting my product feel free as well to contact my office if you want to chat about the unit or installation info be happy to oblige any way i can , number is in the manual (800-245-6489) and my office is staffed 8-5 monday-friday