This is Turtle.

Yes it is time for a new one because of furture gas prices.

I would concider a 90% afue or better.

$4500 + $800 for the humidity control may be too much as the group says
but what is too much for your area. Get you a second bid to just check
to see what too much is. i don'
t know the prices in your area and this $4500 might be normal for i
don't know.

The price of a job is only about 1/2 of the job but the other 1/2 is
the professional that will do a good job. So be more looking at what
company does the job than the price of it.

TURTLE