Air conditioner tune up and cleaning. Changed aprilaire high efficiency Merv 11 filter and aprilaire humidifier pad on Goodman furnace with Rheem and Ruud ac and condenser. HVAC service in Mt.Prospect, Palatine, Arlington Heights, Schaumburg, Wood Dale, Itasca, Wheeling, Rolling Meadows, Northbrook, Glenview, Barrington, Elk Grove Village, Etc.