GHAC Heating & Air Conditioning ac, a/c, htg, GHAC. Greenville Heating and Air Conditioning, ac, a/c, htg , Meadville Heating and Air Conditioning, is a Pennsylvania heating, htg, cooling and air conditioning, ac, a/c service and replacement company, located in Mercer County, that services Crawford County PA, Venango County PA. Serving the boroughs, towns and cities of Adamsville PA, Atlantic PA, Cambridge Springs PA, Carlton PA, Centerville PA, Clarks Mills PA, Cochranton PA, Conneaut Lake PA, Conneautville PA, Cooperstown PA, Espyville PA, Farrell PA, Franklin PA, Fredonia PA, Geneva PA, Greenville PA, Grove City PA, Guys Mills PA, Hadley PA, Harmonsburg PA, Hartstown PA, Jackson Center PA, Jamestown PA, Linesville PA, Meadville PA, Mercer PA, Oil City PA, Saegertown PA, Sandy Lake PA, Sharon PA, Sharpsville PA, Sheakleyville PA, Stoneboro PA, Slippery Rock PA, Titusville PA, Townville PA, Utica PA, Venango PA, Brookville OH, Clark PA, Hubbard OH, Masury OH, New Bedford PA, New Castle PA, New Galilee PA, New Wilmington PA, Pulaski PA, Shenango PA, Transfer PA, Volant PA, West Middlesex PA, Wheatland PA, Andover OH, Williamsfield OH, Wayne Center OH, Orwell OH, Vernon OH, Johnston OH, Burghill OH, Hartford OH, Fowler OH, Kinsman OH.GHAC services and repairs all furnace, AC, humidifier, filter, thermostat, air conditioner, heat pump, geo thermal , boiler, tankless water heater and water heater brands including Carrier, Bryant, Payne, Trane, Lennox, Rheem, Ruud, Amana, Crown, Dunkirk, Utica, Frigidaire, Gibson, Goodman, Lochinvar, Maytag, Weil McLain, AO Smith, Kohler, American Standard, General, Aprilaire, Honeywell, White Rodgers, Dynamic, Skuttle, Everrest, Bradford White, Slantfin, Armstrong Air, Airease, Ducane, Luxaire, Duomatic Olsen, DMO, Aireflo, York, Tempstar, Miller, Thermopride, Intertherm, Coleman, Rinnai, Hallowell International, Florida Heat Pump, Hydrotherm, Climate Master, Water Furnace, ADP, Airtemp, Allied, Argo, Beckett, Broan, Buderus, Burnham, Chigo, Comfort Maker, Dectron, ECR, Fujitsu, Geo Excel, Laars, Perfection, Polaris, Reznor, Tappan, Vaillant.