Chicagoland's Family-Owned Heating and Cooling Experts With Over 50 Years of Experience
From furnace repair and AC installation to air duct cleaning, air purifying, and 24/7 emergency HVAC service, McNally’s is the trusted choice for homeowners and businesses. With offices in St. Charles and Crystal Lake, our expert technicians serve Kane, DuPage, McHenry, Cook, and surrounding counties – delivering honest pricing, award-winning service, and comfort you can count on.
Voted The Best Heating & Air Conditioning Company in Kane County
McNally’s is a three time winner of the Angie’s list Super Service Award and voted "Best of the Fox" for Heating and A/C Companies in Kane County multiple years in a row. Whether heating, cooling, or advanced air systems, our customers know that McNally’s means quality.
Our Heating & Cooling Services
From furnace repairs to full system replacements, McNally’s keeps your home warm all winter long. We service all major brands and back our work with a 2-year limited warranty on repairs.
Stay cool and comfortable all summer with McNally’s expert AC repair, maintenance, and installation services. We work with all makes and models to keep your system running efficiently.
Whether you’re replacing an aging system or installing HVAC in new construction, our certified technicians get it done on time and on budget. All installations come with a 10-year limited labor warranty.
Regular tune-ups extend the life of your system and catch small problems before they become expensive ones. Ask about our Pot of Gold Maintenance Plan for priority scheduling and exclusive member discounts.
Complete Control Right At Your Fingertips
Adjust your home’s climate with ease — whenever you need, from any device.
HVAC Installation For Home & Business Owners
Residential
Commercial
Top Rated HVAC In Northern Illinois
We are the repair, installation and maintenance partner of choice for Chicagoland residents and businesses. Available 24/7 to service the HVAC needs of our customers.
Current Promotions
Why McNally's?
Competitive Pricing
Honest, competitive pricing, with no hidden costs.
Peace Of Mind
10 year limited labor warranty - installs, 2 year limited warranty on repairs.
Knowledgable Technicians
Professional, punctual and courteous service technicians.
Quality Control
All of the work we complete is thoroughly tested.
Award Winning
Recognized multiple times for our exceptional service.
