Stevo,

I just had a whole new system installed. I went with a Trane. From what I was told by a couple of companies; includung their installers. Lennox has been difficult to get parts for.

Mike

A few years ago Carrier was the most efficient furnace, however, they were having problems with some of their boards. It would be safe to assume they have their problems worked out by now.
Lennox has had problems with their choo-choo- train operation. Many dissatisfied customers.
I would not consider them in the same class as some of the others.
I have had a Rheem for 9 years with no problems.

I should have specify the problem I am having
with the existing furnance. I have a two story house and the second level has poor heating and cooling. One of the bids suggested me to have a higher CFM to have better cirulation. Currently I have 1600 CFM
to increase to 2000 CFM. Would that help? Or
is there another solution?

Stevo