Furnace preventative maintenance and tune up on Rheem/Ruud 2 stage variable speed furnace. Replaced aprilaire humidifier pad and aprilaire filter. HVAC service, repair, quotes, installs and more in Palatine, Wheeling, Rolling Meadows, Northbrook, Glenview, Barrington, Itasca, Schaumburg, Arlington Heights, Elk Grove Village, Des Plaines, Elgin, Hoffman Estates, Mt.Prospect, Buffalo Grove, Long Grove, Prospect heights and more