Paramount Heating & Air Conditioning. LLC, is an Ohio OH Heating, Cooling, Air Conditioning, Geothermal Heat Pump, Ductless Mini-Split, Fireplace and Furnace repair, service, replacement and maintenance Company located in Columbus, Ohio . Paramount Heating & Air Conditioning. LLC employs only the best technicians for air conditioner repair and, furnace repair as well as all air conditioner replacement, furnace replacement and boiler replacement in Columbus OH.