it is called prestons guide
http://www.prestonsguide.com/
I found a furnace today with no name plate on it. The model # was PBKMLD20N120G I'M lookin for the mfg. If anybody could help I would appreate it. I'm also lookin for the book name that has all that info listed. It's called the petterson guide or somthing close to that maybe.
Thank you,
it is called prestons guide
http://www.prestonsguide.com/
Luxaire, Maybe.
Or one that is similar to it.
If you try to fail, and succeed.
Which have you done ?
Thank you sir...