Very intrestins what I read on here about a... about a 1/2 ton over size coil... 3 1/2 ton for a 3 ton conpressor... I would think the manafactor does a good job at matching the coil to the comp... or don't they? Wonder what my hvac man would say when I'm ready for a new unit... if the cased... over size unit fits the duct work.. I guess the cfm's will be OK?. well... thank you all... your all very smart people... richard