Referencing the attached documents and assuming I got the load calculation right, would the following Goodman equipment be a reasonable selection to add on to an existing 80K furnace. I've used Goodman in this example because the data is ready available. Actual equipment will likely be different, but I just want to know if I understand this or not.
Condensor: DSXC160241A 2 Ton 2 Stage
Sensible = 20,690
Latent = 3,199
From the expanded data, S/T ratio = .81 at 800 CFM making sensible BTU = 19,444 / Latent = 4,560
At 900 CFM S/T ratio = .84 making sensible BTU 20,160 / Latent = 3,840.
I've had several contractors look at this now and two of them have suggested 3 TON units. My existing unit is 2 1/2 TONs and it we tend to overcool things in an effort to keep the humidity down. This approach really drives up the electric bill and makes the house uncomfortably cool.
I would really like to get the humidity down close to 50% without the overcooling.
I appreciate the input.