chimneylinerjames
Feeling the Heat
Do you know how many input BTU's your furnace is? You would need to figure that out first to see what size of liner you need. Then go to the roof and measure the inside dimensions of the terra cotta flue. My guess for height would be about 25' if the furnace is in the basement. Take a flash light and inspect down the chimney for possible bends of flues that are not aligned very well on top of each other.
Many times, you can use a 5.5" liner, that will give you the little extra space needed to make the install easier.
Here is a link to help you decide what size liner you need. (broken link removed to http://www.chimneylinerdepot.com/articles-2/chimney-liner-articles/flex-liner-sizing-charts/)
Many times, you can use a 5.5" liner, that will give you the little extra space needed to make the install easier.
Here is a link to help you decide what size liner you need. (broken link removed to http://www.chimneylinerdepot.com/articles-2/chimney-liner-articles/flex-liner-sizing-charts/)