Need Help Making Final Decision on HVAC
I am coming down to the final decision on choosing a replacement HVAC system for my 1900 sq ft ranch home and need to decide, do I go with the basics or pay for all the extras that have been proposed?
Currently, I have a Trane XB furnace, manufactured in 2007 (80,000 BTUs), a 3 ton ADP coil (2006), and a 2 ton Carrier 38TKB AC from 1991. The AC is not working at all right now. I am thinking of changing the AC with Carrier Perf. 16 (24ACC6) and the coil (CNPVP) and install new duct work. Total cost ... $6,700 (I think about $2,200 of the cost is for installing new duct work, and the remaining $4,500 is for the AC equipment).
My main question is, does it makes sense to keep the current Trane XB furnace or also replace it for an additional $2,000 with a new Carrier 66,000 BTU furnace, 80% AFUE (58CVA070-12)? The current furnace seems to work fine, but it is a one stage, not variable. Does it really make a difference if I have variable or not? Does replacing an 80,000 BTU furnace with a 66,000 BTU furnace make sense when we have had a problem getting sufficient air to all the bedrooms.
If I don't change the furnace, does that mean I have to stick with one stage AC? Does a two stage AC really make a difference?
-If I add a new variable furnace ... the total would now be $8,800.
-If I go to a two stage Infinity 17 AC (#24ANB724) ... total is $9,250.
-If I go to Infinity 21 (#24ANB124) ... total is $10,050.
-If I go to a 95 + efficient condensing furnace ... total $11,500.
I really wanted to pay no more than $6,000 because we just bought the house and there is a lot of other stuff to fix (windows, doors, roof, fence etc.) ... so would it be ok if I just replaced the AC and coil right now, and fixed duct work (i.e. would this give me hot air in winter, cold air in summer, at a decent efficient rate), or do all these "extras" make sense (as the companies selling me these systems are telling me).