I just bought an Energy King 480EK furnace; the furnace flue size is 6". Now its time to build the chimney. I'm planning on building an outside masonry chimney with 8" square flue. Should I go with a 6" thimble to match the furnace flu size or should I go larger to an 8" thimble and use a 6" thimble to reduce the size? I was thinking of going 8" for future use, but then again how often am I going to replace the furnace.
This forum is for common products and questions such as chimney installations, CO detectors, coal bin designs and a variety of other general topics that do not fit into the other forums.
2 posts • Page 1 of 1