CNO Comfort zone works with all makes and models of furnaces, air conditioners, and boilers through out St. Charles and St. Louis county areas. We are licensed and bonded. No matter what type of air conditioning or heating unit you have, we can provide service, replacements, and routine manitenance. We are Affordable, Professional, and Reliable.

  • Tune ups
  • Clean and Check
  • Gas Furnaces
  • Electric
  • Furnaces
  • Air Conditioners
  • Heat Pumps
  • Humidifiers

  • Air Cleaners
  • UV Lamps
  • Thermostats
  • Repairs
  • Water Boilers
  • Steam Boilers
  • Custom Sheet Metal Work

To schedule an appointment give us a call at 1-636-578-1777 or, send us an email through our contact form

Contact Us

Affton, Arnold, Baden-Riverview, Ballwin, Bellefontaine Neighbors, Belleville, Berkeley, Breckenridge Hills, Brentwood, Bridgeton, Carondelet, Chesterfield, Clayton, Clifton Heights, Collinsville, Creve Coeur, Des Peres, Edwardsville, Ellisville, Eureka, Fairview Heights, Fenton, Ferguson, Florissant, Glen Carbon, Granite City, Hazelwood, High Ridge, Hillsboro, House Springs, Hyde Park, Imperial, Jefferson County, Jennings, Kirkwood, Lake St. Louis, Lemay, Manchester, Maplewood, Maryland Heights, Normandy, O'Fallon (MO), Oakville, Olivette, Richmond Heights, Sappington, Soulard, South Hampton, Spanish Lake, St. Ann, St. Charles, St. Charles County, St. Louis-Downtown, St. Louis Place, St. Peters, Swansea, Tower Grove, Town and Country, University City, Valley Park, Webster Groves, Wentzville, West County, West End, Wildwood