In a typical full-sized home AC system [central air] is there a problem with oversizing the condenser? In particular, the idea is to add a pre-cooler just before [above] the condenser. This would provide additional cooling as well as increasing the volume of the system. I tend to assume that the additional cooling capacity wouldn't be a problem as the expansion valve would still continue to regulate the temp of the expansion coil. Also, presumably the condenser fan would only operate as/if needed, so the precooler could go on or offline without causing any problems. Yes? No? Not sure about volumetric concerns. My inclination is to assume that there is a new proper charge level [ozs of freon], and everything would otherwise operate nominally. I need to steal heat from the condenser. Unfortunately, I can't say any more about the specific goal at this time. But I can describe what happens functionally.