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24/7 Emergency Service 847-305-2800

HVAC Service in northwest suburbs

Leading the way in high
efficiency equipment


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Early Bird A/C Sale
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Expires: 4/30/25

Financing Options to Fit Everyone’s Needs

Financing for 72 months on qualified products. Provided by Wells Fargo. Available With Approved Credit. Cannot be combined with other offers. Call for details.
Expires: 4/30/25

Heating & Furance Services

We offer professional heating services for all makes and models of furnaces, provide convenient appointment times, and offer financing with approved credit.

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Air Conditioning Services

Even if your air conditioner is only 10 years old, you stand to save 20% to 40% of your cooling energy costs with the installation of a new high-efficiency model.

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Welcome to Lea Heating & Air Conditioning

Where more personalized and dedicated customer service is our standard operating procedure.

We are a second-generation, family-owned HVAC provider in Northeast Illinois, including Elgin, Crystal Lake, Carpentersville, Algonquin, West Dundee, Sleepy Hollow, East Dundee, Lake in the Hills, and Hoffman Estates, IL. Continuing 45 years of excellence in the residential and light commercial heating, cooling, indoor air quality, and hot water fields, we exemplify leading innovation and proven integrity.

Take advantage of experience.

Over 46 years of service

Ductless HVAC

Specializing in a broad range of ductless air conditioners and heat pumps, we resolve even the toughest challenges with the flexibility of installation.

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Heat Pumps

Remarkably environmentally friendly, heat pumps are an ideal choice to both heat and cool your home in Northeast Illinois.

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Indoor Air Quality

Even if you enjoy the distinctive change of seasons, you prioritize a tightly sealed home and probably worry about the resulting indoor air quality concerns.

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Trusted Heating & Cooling Services from Lea Heating & Air Conditioning

Give us a call at 847-305-2800 for a free estimate and let our NATE-certified specialists set your mind at ease. Our small team of HVAC professionals are background checked, drug-screened, and represent the best of the industry. We achieve successful results by catering our strategies to your specific needs, never cutting corners, and always prioritizing the quality of products and workmanship.

847-305-2800Schedule Service

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for your HVAC repairs, maintenance & installations!

Showcasing high-efficiency equipment, Lea Heating & Air Conditioning is recognized as a Bryant Factory Authorized Dealer. We are a National Award Winning Company, and our line of options for new installation and replacement is sure to resolve any challenge, deliver exceptional comfort, and achieve your goals. We are skilled in the repair and maintenance of all makes and models of furnaces, air conditioners, boilers, water heaters, ductless systems and so much more. On-call for 24/7 emergency service, Lea Heating & Air Conditioning is synonymous with reliability and satisfaction.

847-305-2800

As a Bryant Factory Authorized Dealer

Lea Heating & Air Conditioning has met the highest standards for technical know-how, customer service, and ethical practices. Our team of heating and AC technicians is a small group of experienced individuals, hand-picked for their industry knowledge, professionalism, and customer focus. They are background checked, drug-screened and NATE-certified, so you can rest assured your HVAC systems are in the best hands in the field.

Our HVAC Services

We are a full-service heating and cooling contractor offering both residential and light commercial customers unmatched expertise in comprehensive comfort systems, including high-quality indoor air quality solutions. We do everything from creating custom ductwork at our in-house shop to repairing the leading IAQ and smart products on the market today. And because we’re a Bryant Factory Authorized Dealer, we can offer the industry’s leading warranties on all new Bryant® installations and replacements. Contact us for heating and AC solutions in Elgin, Crystal Lake, Carpentersville, Algonquin, West Dundee, Sleepy Hollow, East Dundee, Lake in the Hills, and Hoffman Estates, IL.

Why Choose Us
QUALITY SERVICE

Our trained HVAC technicians are NATE-certified and committed to excellence.

EXPERIENCE

Lea Heating & Air Conditioning has been in the HVAC business for over 40 years.

INTEGRITY

We promise honest and fair pricing for our factory-authorized workmanship.

Air Conditioning Installation, AC Repair, HVAC Installation, Furnace Repair & AC Service Elgin, IL, Algonquin, IL, Carpentersville, IL, Hoffman Estates, IL, Sleepy Hollow, IL & West Dundee, IL

Heating Service Elgin, IL | AC Repair Algonquin, IL | HVAC Company Carpentersville, IL

HVAC CompanyHeating ServiceAir Conditioner Repair ∴ Sleepy Hollow, IL ∴ Carpentersville, IL ∴ Algonquin, IL

What others say


Mike Lea was wonderful giving me a quote, explaining the price, discounts, the process etc. The crew was friendly, worked like a well oiled machine and explained what they to doing. I purchased a furnace, A/C, humidifier & thermostat. Everything was cleaned up when they were done and I couldn’t even tell they had been at my home. Fast, efficient and good price! I highly recommend Lea Heating & Air Conditioning.

Patti Flessner

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