By John from Eagle Nebraska on January 12, 2013
I have a 9 inch metalbestos chimney, I want to put a flex liner in it to convert to a B vent stove can this be done? What options do I have to use this chiney with a gas fireplace or stove.
By Collin C. - NFI Master Hearth Professional on January 14, 2013
Answer:A chimney liner or smaller vent pipe can indeed be routed through the existing 9 inch chimney. However, it is likely that a custom trim ring will need to be made to conceal the space between the smaller and larger diameter pipes. Of course, this will only be important if the end of the chimney will be exposed. The piping can be supported at the top of the chimney in various ways, including use of metal strapping or brackets. This will allow you to keep the factory cap in place.
By Richard from Bucyrus, Ohio on September 23, 2013
I have a masonry chimney with no liner. Moisture ruins the ceilings upstairs. I only have gas appliances, 70000 BTU 80% furnace and hot water heater using the chimney. Do you have a kit that will allow both appliances to hook up properly to the chimney? The furnace goes in then up 18". The 3" hot water heater goes in, and the furnace is a 4" diameter pipe.
By Collin C. - NFI Master Hearth Professional on September 24, 2013
Answer:In order to properly vent both appliances, a combination of components will be needed. The main liner should be a 5 inch diameter, in order to accommodate the inflow of gases coming from both appliances. The liner could be run down the length of the chimney to the point where the water heater exhausts. A tee with a 3 inch takeoff can be used there. Either rigid or flexible 4 inch can be run from the furnace, up to the bottom of the tee. A 4 to 5 adapter will be needed at the bottom of the tee to tie the system together.