[GBlist] oversz air/heat unit?

["J Frost" <jsf3018@neo.tamu.edu>]

Just got off the phone with a  aircondition/heat contractor to set up
     an appt. for an estimate  to install  air/heat.
He said off the top of his head that  I would need a   2 or 2.5 ton 
unit.

Alarms went off in my head cause i know  you are suppose to put 
some effort into   " sizing" the unit correctly;  especially in my 	
												humid climate.

 My question is,  how  can I make sure he is selling me the correct 
size unit?     any advice would be helpful.

Thanks in advance
jfrost

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