O’Fallon’s AC Installation Experts

    AC Installation in O'Fallon, MO

    When you’re ready to move forward with an AC installation in O’Fallon, MO, you can turn to Scott-Lee Heating Company for help. Our locally owned and operated company has been serving the residents of this St. Charles County city since 1978. We understand the importance of performing high-quality work so that our customers can have peace of mind. Both residential and commercial services are offered. Our highly trained technicians can work on all makes and models of air conditioners. We’re prepared to offer advice about which unit would be right for your unique cooling needs.

    Our company is known for:
    • Providing highly personalized services
    • Operating with integrity
    • Maintaining open lines of communication
    • Using high-quality parts, products and materials

    To ensure that our technicians have the skills for any job, they’re given ongoing training. We’ll make sure that you get a new AC system that is properly sized for your home.

    Exceptional AC Replacement in O’Fallon

    Quality AC Replacement in O'Fallon, MOA new air conditioner in your house could be a great financial investment. We work with energy-efficient units that could lower your energy bills and save you a lot of money in the long run. The technicians from Scott-Lee Heating Company will remove your old AC unit from your O’Fallon property carefully. We’ll make sure that all waste gets disposed of properly.

    Focus is put on:
    • Arriving at our appointments punctually
    • Working efficiently and meticulously
    • Keeping a tidy work area
    • Cleaning up completely when we’re done

    When we’re finished with an O’Fallon AC installation, we’ll show you how to operate your new system. We want people to be able to take advantage of all of the features of an air conditioner. Our company is prepared to offer any follow-up support that is needed.

    Dependable AC Installation Services in O'Fallon, MO

    Schedule a Consultation Today

    The technicians from Scott-Lee Heating Company are fully licensed, bonded and insured to perform any AC replacement in O’Fallon. Our company is proud to be a Lennox Premier Dealer and to have won the Dave Lennox Award 26 times. The complete satisfaction of each of our customers is important to us, and we refuse to cut corners with anything we do. We’ll always have your best interests in mind and make sure any of your questions are answered thoroughly. Building lasting and trusting relationships with our customers is placed as a top priority.

    The AC technicians from Scott-Lee Heating Company can also do maintenance and repair your current air conditioner in O’Fallon. We offer heating replacements and services, as well. To find out more about how we could help with your project, call our office today.

    Frequently Asked Questions


    What factors influence the cost of AC installation in O’Fallon, MO?

    Installation cost depends on system size, unit efficiency rating, ductwork condition, and any additional electrical upgrades. Scott-Lee Heating Company provides a detailed, no-surprise estimate before work begins.


    How long does a typical AC installation take in O’Fallon?

    Most installations in O’Fallon are completed within one day. Our NATE-certified technicians work efficiently to minimize disruption while ensuring proper setup and testing of your new system.


    What should I do to prepare my home for AC installation?

    Clear access around your existing unit and indoor air handler, remove any obstacles, and ensure pets and children are safely out of the work area. Having past service records handy also helps streamline the process.


    Does Scott-Lee Heating Company install all major AC brands and models?

    Yes. Our technicians are trained to install and service leading AC brands, ensuring your new system performs reliably and efficiently in O’Fallon homes.


    Are permits required for AC installation in O’Fallon, MO?

    In most cases yes—city or county permits ensure installations meet local codes. Scott-Lee Heating Company handles all permit applications and inspections on your behalf.


    Can a new AC installation improve my home’s energy efficiency?

    Absolutely. Upgrading to a high-SEER unit can lower utility costs and enhance cooling performance. We’ll help you choose the right efficiency rating for your O’Fallon home.


    What post-installation maintenance is recommended?

    We recommend quarterly filter changes and annual tune-ups to keep your system in top shape. Scott-Lee Heating Company offers maintenance plans designed for O’Fallon homeowners.


    Can you remove and dispose of my old AC unit?

    Yes. We safely remove, recycle, or dispose of your old equipment following environmental regulations, ensuring a hassle-free installation experience in O’Fallon.


    Do you offer emergency AC installation services in O’Fallon, MO?

    Yes—Scott-Lee Heating Company provides emergency and off-schedule installations for urgent cooling needs. Call us anytime, and we’ll prioritize your O’Fallon home.