I just love to read our installation instructions and see if there have been any changes or improvements. This way, I can learn something new every now and then. Well, I was just reading through the latest Install Instructions for our 90+% furnaces and found something that I think will be of real interest to you (and something new that I learned so it is going to be a GREAT day). Click on the furnace venting link below to open up a word document that you can print out to see what I learned:
Did you ever think that you could vent a furnace down through the floor? Well, now you can say you have. Hopefully this will help get some more jobs for you. Remember this is ONLY for 90+% efficient furnaces
Keep in mind, that the termination on the outside of the house still needs to be at least 12 inches above anticipated snow level.
Be sure to follow all the steps in the Install Instructions for this venting arrangement to assure safe operation of the furnace.