Both existing air conditioning units on the roof servicing the warehouse are past their useful life expectancy. Both units are 14 years old. The units use R-22 Freon which is outdated and no longer permitted. Not environmentally friendly. The units have metal condensate pans which are rusting and leaking. The coil in one of the units has a leak someplace and causes the system to freeze up then defrost causing water to leak through the ceiling. The other unit has a defective condenser fan motor causing the system to overheat and shut-off. Both units are old and compromised and should be replaced.