24/7 Emergency Service 847-305-2800

HVAC Service in Northeast Illinois

Leading the way in high
efficiency equipment

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Summer A/C Sale




Expires: 6/30/24
Financing Options for Repairs & Replacements

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: 6/30/24

Financing Options for Repairs & Replacemements

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 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 45 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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UV Air Purifier

UV air purifiers take advantage of ultraviolet light to inactive bacteria, viruses, mold, and a long list of pathogens that otherwise cause disease and sickness.

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Whole House Humidifiers

The indoor air is typically low in humidity, and the lack of essential moisture leads to all sorts of problems.

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Hot Water Heaters

Water heating accounts for approximately 20% of your total energy bill. A new hot water heater is an opportunity to increase efficiency and trim expenses.

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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.

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Call our team
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.


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

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


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


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

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

HVAC Company Algonquin, IL | AC Repair Carpentersville, IL | HVAC Contractor Elgin, IL

AC ContractorHVAC CompanyAC CompanyHVAC Contractor ∴ Hoffman Estates, IL ∴ Sleepy Hollow, IL ∴ Algonquin, IL

What others say

I’m very pleased with Lea heating & Air, I had a quote done, very reasonable price, i called scheduled an appointment for whole HVAC system install, Ron & Joshua were professional very knowledgeable, never messy, after the job was complete they both explained everything to me, these two guys know what they’re doing. I would highly recommend Lea to everyone, they’re awesome!

Dorinda Fucarino

We have used Lea Heating services for 20 years. They repaired and maintained HVAC in our large family home in this area and replaced the furnace and air conditioner when required. Now that we downsized to our “retirement” home, we knew immediately they were the ones to call for this place too. They have always been responsive, professional and pleasant too. They provide information and answer questions, do not pressure sell and provide quality equipment. Yesterday they installed a new furnace and air conditioner in a timely manner, were considerate, clean and helpful in their approach. One gentleman even carried in some groceries for me! They left the site in tip top condition with everything working. Highly recommend Lea Heating.

Mary Loete

I highly recommend Lea Heating and Air. They are very fair priced and knowledgeable about what needs to be done. Josh and Andy installed my central air yesterday. I’m very happy with their work. Both were friendly and very efficient. They took the time to answer any questions that I had and cleaned up beautifully. Thank you again for a job well done!!

Kristi Weseman

From the estimate to the install, everything was excellent. With being a retiree from the trade world, the work was clean, started on time, finished on time, very impressed! Would highly recommend!!!

Rick Adkins

We had a new AC & Furnace installed one month ago; everything is working perfectly from day one. Mike came out initially and gave us a few options that would work with our home, was very helpful and answered all of my questions. Andy and Jordan installed our new AC & Furnace in a single day, amazing job considering we have a very cramped utility closet. Very pleased all around, I highly recommend!

Kyle Stewart

We have used LEA HEATING and cooling for 8 years,top notch company, they are on time, attention to detail and work is perfect. Clean up is best in class. Todays LEA rep was Duane, and he is a true professional. Great company.

Jon Trent

I used Lea Heating for a normal maintenance service check up in my new townhouse. They were able to accommodate an early morning appointment and kept within the time frame quoted. Duane answered my questions politely and gave me good information for future heating/cooling situations. I would use this company again.

Nancy Roozee

I had an issue with an update on my thermostat. I contacted one local company and they had sent two guys out that had no idea what the issue was. I then contacted Lea Heating & Air Conditioning. I had the opportunity to talk with Robert and he went “way out of his way” to help me out. Outstanding customer service! He is very knowledgeable in his work, was pleasant to work with, and was reliable. Outstanding companies like this are hard to find. I will always call them first for any work that needs to be completed. I highly recommend them!

Brandon L.

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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