You will need every bit of that A/C unit. Most HVAC guys way underestimate the heat/cool loss from glass. Even good glass has a huge loss. My friend who just build his conservatory 14'x20' put in a 3 ton unit like that and it wasn't enough to keep the temps down in the upper parts. All of the glass with the sun just sucks the cool right out.
He is already looking at modifications for next year.
It is coming along nicely. I guess you won't be using sprayers with all of that furniture and electronics.
