Help if you could
My house is located in South Carolina and is roughly 2300sqft--one floor\brick. I upgraded the windows to a Low-e\argon\1" glass that according to the "specs" perform very well. The exterior walls will have regular fiberglass (R13) batt insulation. I am condsidering foam in the exterior walls with fiberglass\cellous in the rest.
I had a Manual J study done and it only recommened a 3.5 ton unit. Does this seem correct? I realize some people do it by sqft, but shouldnt the study be somewhat helpful?
What should I look for in a unit?
The builder is only going to put in a seer13. Is that a waste considering the upgrade to the windows?
Should I increase the seer rating versus "foaming" the walls?