So, a coworker came to me with a question about chimneys and clearances, for his Vermont Castings WinterWarm 1280 Large. He is having an addition put on the house, and the builder installed a truss only 1" from his masonry chimney for this stove. The chimney has a clay tile liner, and then a 10" (he believes) un-insulated stainless liner inside that.
My recollection is that the required clearance to a masonry chimney is more than 1" (actually 2" or 4" seems to stick in my head), and I would assume that an un-insulated liner inside a clay flue does not affect required clearances. I do remember very clearly that a blanket-wrapped liner stuffed into a clay tile flue will allow for "zero-zero" clearances, in which there is zero clearance between the liner and masonry/clay, and zero clearance between the outside of the stack and framing. This info came from Dale at Duravent, when I was dealing with a similar problem in my own house.
My advice to him, assuming he really does have a 10" un-insulated liner, would be to pull it, and replace with an 8" blanket-wrapped liner (same OD). His stove manual, of which I was able to find an exerpt on scribd (but not the whole manual), indicates an 8" minimum flue. His chimney is also not very tall, this being a rancher house.
Advice?
My recollection is that the required clearance to a masonry chimney is more than 1" (actually 2" or 4" seems to stick in my head), and I would assume that an un-insulated liner inside a clay flue does not affect required clearances. I do remember very clearly that a blanket-wrapped liner stuffed into a clay tile flue will allow for "zero-zero" clearances, in which there is zero clearance between the liner and masonry/clay, and zero clearance between the outside of the stack and framing. This info came from Dale at Duravent, when I was dealing with a similar problem in my own house.
My advice to him, assuming he really does have a 10" un-insulated liner, would be to pull it, and replace with an 8" blanket-wrapped liner (same OD). His stove manual, of which I was able to find an exerpt on scribd (but not the whole manual), indicates an 8" minimum flue. His chimney is also not very tall, this being a rancher house.
Advice?
