Quality HVAC Service You Can Count On
Serving McHenry, Lake County and the Northwest Suburbs
for over 30 years.
Residential, commercial, industrial and emergency service available.
Need immediate help? Call (630) 940-9155 now
Why Customers Choose CRS
Woman Owned & Operated in McHenry
Specializing in Boilers & Radiant Heat
Up-Front Pricing — No Surprise Fees
CRS is proudly woman‑owned and operated, with a focus on treating every customer the way we’d want to be treated — with honesty, clear communication, and respect. We stand behind our work and strive to deliver the kind of service homeowners deserve.
Up-Front Pricing — No Surprise Fees
Specializing in Boilers & Radiant Heat
Up-Front Pricing — No Surprise Fees
You’ll always know what to expect. We offer honest, transparent quotes with no pushy upsells or last-minute surprises.
Specializing in Boilers & Radiant Heat
Specializing in Boilers & Radiant Heat
Specializing in Boilers & Radiant Heat
We’ve built a reputation as true boiler specialists — with deep experience in steam, radiant, and high-efficiency systems.
Repair for All Major Brands
Clear Communication at Every Step
Specializing in Boilers & Radiant Heat
From Carrier to Lennox to Rheem, our team services all major HVAC brands — even if we didn’t install the system ourselves.
Friendly, Uniformed Technicians
Clear Communication at Every Step
Clear Communication at Every Step
Our technicians arrive ready to help: courteous, easy to recognize, and trained to do the job right the first time.
Clear Communication at Every Step
Clear Communication at Every Step
Clear Communication at Every Step
From first call to final walkthrough, our team keeps you informed so there are no surprises or missed details.
Our Services
Air Conditioning
Indoor Air Quality
Air Conditioning
Heating
Indoor Air Quality
Air Conditioning
Indoor Air Quality
Indoor Air Quality
Indoor Air Quality
Where Service Still Means Something
Your Trusted HVAC Partner - CRS Heating and Air Conditioning
CRS Heating and Air Conditioning is proud to be a woman-owned business built on long-term relationships and honest work. We’ve been serving McHenry, Lake County, and the surrounding Northwest Suburbs for over 30 years.
Our focus is simple: treat every customer the way we’d want to be treated. That means clear communication, reliable scheduling, fair pricing, and top-tier workmanship from start to finish. Whether we’re visiting for a simple tune-up or a complex system repair, our goal is to earn your trust and your business for life.
Smart Maintenance. Real Peace of Mind.
At CRS, we know how to keep HVAC systems healthy and reliable. Our maintenance plans include seasonal tune-ups, optional smart sensors, and priority scheduling — all designed to keep your system running smoothly while giving you real peace of mind, year after year.
Proudly Serving McHenry County & the Northwest Suburbs
CRS Heating and Air Conditioning, Inc. is your trusted source for top-quality HVAC services in:
Algonquin | Arlington Heights | Barrington | Buffalo Grove | Cary | Crystal Lake | Deerfield | Fox Lake | Grayslake | Hoffman Estates | Huntley | Lake Villa | Libertyville | Lincolnshire | McHenry | Vernon Hills and More!