A comprehensive list of in Grayslake, IL commercial and residential air conditioning companies offering installation, replacement and repair services. Read unbiased customer reviews and recommendations of local contractors. 
Located in the heart of Lake County and founded in 1984 Northern Air Systems services and installs residential, light commercial and industrial forced air heating and cooling equipment, boilers, humidifiers, air filters, UV lights and thermostats throughout Chicagoland. Our sheet metal shop gives us the flexibility to fabricate any ductwork or fitting required for a proper professional installation
Dee Ferrigan — The answering service was very polite and helpful. Scott called back within 5 minutes and arrived within a half hour of my