In a place like Mundelein, IL, where winters bite and summers sizzle, your home’s comfort relies on a dependable HVAC system — and more importantly, on the contractor you trust to keep that system running at its best. For over 70 years, Gleason Heating and Air Conditioning has been the preferred Mundelein, IL HVAC contractor, helping homeowners and businesses stay comfortable in every season.
We offer full-service solutions, from heating and cooling to plumbing and indoor air quality improvements. With round-the-clock availability and a reputation for quality, our skilled technicians bring peace of mind with every visit.
Why Gleason Is the Go-To HVAC Contractor in Mundelein, IL Gleason Heating and Air Conditioning has earned a trusted name in the Mundelein community by focusing on exceptional service, integrity, and long-term value. Whether you need an emergency repair or a full system replacement, we bring unmatched experience and attention to detail.
What Makes Us Stand Out: Over 70 years serving the Mundelein area
Certified, knowledgeable, and friendly technicians
24/7 emergency services for when you need us most
Customized, energy-efficient comfort solutions
Honest advice with clear, upfront pricing
Full HVAC, plumbing, and indoor air quality services
As a leading Mundelein, IL HVAC contractor, we’re committed to doing the job right — every time.
Heating Services for Mundelein Homes and Businesses When winter weather hits hard, your heating system needs to keep up. Whether your furnace won’t turn on, your boiler is leaking, or your heat pump is underperforming, Gleason is ready to help. We’re the HVAC contractor in Mundelein, IL residents call for fast, reliable heating service.
We provide expert repairs, seasonal maintenance, and new system installations — all designed to keep your home cozy and energy-efficient.
Our Heating Services Include: Furnace repairs and replacements
Boiler repair and new installations
Heat pump servicing and upgrades
Water heater repair and replacement
Commercial heating solutions
Seasonal system tune-ups and inspections
No matter the make or model, we’ll make sure your heating system is running safely and efficiently.
Air Conditioning Services from Your Local Mundelein, IL HVAC Contractor A working AC system is essential during Illinois summers. If your system breaks down or struggles to cool your home, Gleason is ready to respond. As your local Mundelein, IL HVAC contractor, we deliver fast, effective air conditioning repair and installation services.
If it’s time for an upgrade, we’ll help you choose a new system that suits your space, your budget, and your energy goals.
We Offer: Central AC repairs and installations
Ductless mini-split system services
Smart thermostat installation
Preventative AC maintenance and inspections
Commercial cooling services
We’ll keep your home cool, comfortable, and energy-efficient — no matter how high the temperatures rise.
Full-Service Plumbing from the Team You Trust Plumbing issues can strike at any time and quickly become a major headache. That’s why Gleason provides dependable plumbing services alongside our HVAC work. As a full-service Mundelein, IL HVAC contractor, we make it easy to get reliable plumbing solutions from a team you already trust.
From leaking pipes to sump pump installations, we’ve got you covered.
Our Plumbing Services Include: Sump pump installation, repairs, and maintenance
Drain and sewer cleaning
Water heater services (standard and tankless)
Fixture repairs and upgrades
Water filtration and softener systems
Emergency plumbing services, 24/7
We help you avoid bigger problems with fast, effective solutions that keep your plumbing system running smoothly.
Improving Indoor Air Quality in Mundelein Homes Your indoor air quality directly affects your comfort, health, and even your HVAC system’s performance. Gleason offers a full range of indoor air quality services to ensure your home is filled with clean, well-balanced air — not allergens, dust, or excess humidity.
As a trusted HVAC contractor in Mundelein, IL, we’ll assess your home’s needs and recommend the right solutions to enhance the air you breathe.
Our IAQ Services Include: UV air purification systems
Whole-house humidifiers and dehumidifiers
Advanced air filtration and HEPA filters
HVAC zoning for room-by-room temperature control
Professional ductwork cleaning
Let us help you breathe easier and feel better with smart, healthy indoor air upgrades.
Backup Generator Services – Always Be Prepared Power outages don’t have to disrupt your life. Gleason offers expert generator installation, repair, and maintenance so your home stays safe and functional, even during emergencies. Whether it’s a summer storm or a winter blackout, your home will be ready.
Our team helps you select and install the right system and keeps it maintained so it's ready when you need it most.
Serving Mundelein and Beyond Though we’re proud to be a top Mundelein, IL HVAC contractor, we also serve surrounding communities with the same level of care and professionalism. Our service area includes:
Libertyville
Lake Zurich
Wauconda
Vernon Hills
Hawthorn Woods
Buffalo Grove
Glencoe
Winnetka
Wherever you are in the region, you can rely on us for quality work and honest service.
Choose Gleason – A Leading Mundelein, IL HVAC Contractor For more than seven decades, Gleason Heating and Air Conditioning has been helping homeowners maintain comfortable, safe, and efficient living spaces. As your experienced Mundelein, IL HVAC contractor, we bring a deep commitment to quality and satisfaction to every job.
From heating and cooling to plumbing and air purification, we provide complete solutions designed to meet your unique needs. Our team is here for you — with expert service, clear communication, and a job done right the first time.