

Stay Comfortable All Year.
Now offering Emergency service. Call us at 618-828-0075 in IL or 314-570-0436 in MO. (additional Charge for after hours service.)
Dealer Brands
Mon-Clair Heating & Air Conditioning specializes in the installation and maintenance of American Standard and Mitsubishi Mini Split Systems. As well as warranty repair for these products.




Contact Us Today
Call us for your $79 furnace or A/C clean and check. Active military/Veterans and first responders receive a 10% discount!
Call us at:
618-828-0075 in Il or 314-570-0436 in Mo
Email: Monclairheating@gmail.com
Experienced HVAC Contractor
Locally owned and operated HVAC contractor serving Illinois' Monroe, St. Clair, and Randolph counties, specializing in residential and light commercial heating and cooling systems. Owner Nick Antonas has over 20+ years of experience in the field.


Our services
Provide a general summary of the services you provide, highlighting key features and benefits for potential clients.


Service
We can maintain and repair all makes and models of Furnaces and air conditioning systems as well as boilers, water heaters, and gas fireplaces.
IAQ
We can address indoor air quality issues in your home with the addition of humidifiers, dehumidifiers, air scrubbers, uv lights and other options.
Installation
We provide installation of furnaces, a/c's, water heaters, Boilers, and duct work. As well as venting of appliances.
Recent Installations









Proud sponsor of From The Nest Podcast hosted by Tj and Collin


Service Areas
We proudly service Millstadt, Columbia, Red Bud, Freeburg, Valmeyer, Belleville, Swansea, Shiloh, Fairview Heights, Smithton, Dupo, Cahokia, St. louis and Northern Jefferson co in Mo.
Hours
9 AM - 5 PM Monday-Friday
Emergency service also available.

Contact Us
Contact
Il 618-828-0075 Mo 314-570-0436
About Us
Monclairheatingandcooling.com
Like us on Facebook @mon-clair heating and cooling.