I just got a quote from a contractor on replacting a 2 ton 10 seer Bryant heat pump. They quoted replacing it with a 2 ton 14 seer Carrier two speed fan outdoor unit and single speed air handler. They said that the way my duct work is set up it was not able to handle a variable speed unit. They said you would not be able to notice a difference and more than likely the duct work would contribute the overworking the system. My house is not that old so I want to try to use the duct work I have before going with the option of replacing it.
I am trying to heat/cool less than 1000 square feet upstairs with this unit and my master bedroom is downstairs (so we hardly go upstairs for the most part).
The other quotes I have been given are pushing the variable speed unit and are quite a bit higher. I am trying to way the cost benefit of upgrading to the variable unit.