Furnace documentation

Anyone knows what is “CFR2 M documentation for furnace”? Is it usually provided by the furnace manufacturer as a standard document when you purchase it? Thanks!

No idea. Googled it, nothing. You tubed it, nothing.

Ask your home insurance guy if he knows anything about it.

CFR might mean Code for Federal Regualtion. My guess is that it’s something related to furnace energy efficiency

Just guessing: code of fed regulation… CFR › Title 2 › Subtitle M.