Originally Posted by sumdumgai
The current unit is 2 1/2 ton. Is there any reason the contractor would recommend a 3 ton? He says there's not mych differnce in price and he would not charge the difference.
No, unless he's offering a 2-stage (speed) unit. However, that also will be too large because the low side is almost a 2.5 ton, so you would just be wasting money.
What size is the upstairs system? Is it in the attic?