I hope this dosen't violate any rules and if so I apologize and mods please delete.
But I'm building a garage with an apartment above it. Cellulose insulation, brick vaneer, energy star windows etc in Charlotte, NC. 675 living sq ft upstairs 720 garage.
I have a buddy (yeah, you know where this is going) who does commercial HVAC and he decided he would save me some money and do the HVAC on my house. Well frankly, I don't think he knows what he is doing. He got a 2 ton york HP from his warehouse. I'm no HVAC person, just a brick mason and 2 tons seems WAY TOO big! there will be 5 8" s and 3 6" supplies upstairs. Against his judgement I want atleast 2 6" vents in the garage to help cool and heat a little when I work down there and also so it doesnt sound like a freight train coming through the vents upstairs.
Do you Res. guys think he knows what he's doing or am I stuck with some ridiculosly big unit?