We are renovating the upstairs portion of our house. It was previously an unfinished attic and we anticiapte the installation of a separate split system heat pump. The current AC and Furnace only services downstairs and is 2 years old. We have contacted 2-3 companies in our area (got names from websites of Trane, Lennox, and Carrier).
We got several quotes and are confused. They spoke about and indicate variable speed units to remove moisture and cut down on noise (which we want). But when we looked at product website they talk about variable speed compressor and variable speed fans. Before we go back and talk to them, we would like to be better informed as to exactly what we are getting and what we need/want. Also, one of the salesman said that we did not need a "Manual J" (whatever that is) calculation because our renovation is so small (600 sq. ft.) we will be looking at a very small unit. The other two did not mention "Manual J".
Sorry for the novel and thanks in advance for your replies.