By Chris from Cincinnati, OH on October 14, 2014
I live in a log home and I want to install my wood burning stove in my poured concrete basement. Can I rise out of my stove and elbow directly from my foundation wall and use this fitting on my foundation wall? Also, can I just vent directly outside without running a pipe to the peak of my roof?
By eFireplaceStore on October 15, 2014
Answer:This thimble can indeed be used to pass single wall stovepipe through a combustible wall. However, it is not recommended to use single wall stovepipe outdoors, as it does not provide enough heat retention for the stove to draft properly. This thimble is primarily intended to pass stovepipe through a combustible wall that has been constructed in front of a masonry chimney.
The correct way to proceed is to run single or double wall stovepipe to the basement wall, then convert to Class A chimney through the wall and outside. Single wall stovepipe requires a clearance of 18 inches to combustibles, while double wall cuts clearance to 6 inches. I'm not certain how much overhead clearance you may have to the ceiling. Single wall stovepipe may not be an option for you. As far as the Class A chimney goes, it does not necessarily have to run past the peak of the roof, but it must be tall enough to meet the clearances required to your roof.
By David barnum from Sumner, WA on October 20, 2012
What else is needed to attach this to my chimney? Is there a thimble pipe that passes through the center?
By Collin C. - NFI Master Hearth Professional on October 22, 2012
Answer:The only other component that is needed to complete this installation will be a section of 5 or 6 inch single wall stovepipe. The thimble will come complete and will safely pass the single wall stovepipe through a combustible wall or chimney chase.
By Gale from Lake Havasu, AZ on February 5, 2014
Is the 5 inch diameter an inside or outside pipe measurement?
By Collin C. - NFI Master Hearth Professional on February 5, 2014
Answer:The 5 inch measurement is in reference to the inside diameter of the piping. However, this is designed for single walled stovepipe, which will have only a slightly greater outer diameter.
By John from Union Beach, NJ on September 16, 2014
Must I also use the clay thimble or can I just run my 6 inch pipe thru the middle?
By eFireplaceStore on September 16, 2014
Answer:This thimble is intended to pass single wall stovepipe through a combustible wall without the use of a clay thimble as well.
By Paul from Confluence, PA on April 17, 2015
How does this Heat-Fab wall thimble attach to a chimney? How big of a hole needs to be cut in the exterior wall of the room? I have a masonry chimney with a "Supaflu" poured liner. With the poured liner, the resulting diameter of the chimney is about 7.25" ID.
By Brennan W. on April 17, 2015
Answer:The opening required for this thimble is 16" W x 17" H. It can fit any stove pipe with a 5" or 6" diameter.