24/7 Emergency Service 847-305-2800

Seasoned Commercial HVAC Maintenance & Installation

Lea Heating & Air Conditioning is a full-service light commercial HVAC provider serving Elgin, Crystal Lake, Carpentersville, Algonquin, West Dundee, Sleepy Hollow, East Dundee, Lake in the Hills, and Hoffman Estates, IL. With our in-house design shop and product expertise, our commercial staff has the training and experience to install, service, and repair all types of commercial heating, cooling, and indoor air quality systems.


Our extensive commercial HVAC experience has allowed us to identify the heating and cooling solutions that stand out from the rest. Our parts department and sheet metal shop ensure the quickest possible resolution to comfort problems and needs. From new projects and replacements to preventative maintenance and emergency service, the NATE-certified team from Lea Heating & Air Conditioning has you covered.

Improve Your Building’s Indoor Air Quality

Our company recognizes the importance of a safe and healthy workplace, and we strive to deliver cost-effective and convenient options. OSHA estimates that poor indoor air quality costs employers 15 billion dollars annually due to worker inefficiency and sick days. Simply by improving the quality of indoor air, employers can boost performance by up to 10%.

Common commercial indoor air quality issues include:

  • Cleaning products, pest control solutions, personal care products, and even carpets and furniture contribute to degraded air quality.
  • Printers and copiers that emit volatile organic compounds, small particles, and ozone.
  • Computers and other electronics that generate heat and accelerate emissions from plastics, circuitry, and adhesives.

It might be impossible to eliminate all potential sources of contaminants, but improving the air you breathe is both simple and feasible. Through proper ventilation and humidity control, Lea Heating & Air Conditioning can create a healthier, cleaner, and more productive work environment for you, your workers, and customers across Northeast Illinois.

Sign Up for a Commercial HVAC Maintenance Contract

Without regular maintenance, commercial equipment can pose safety concerns and fire hazards. Lea Heating & Air Conditioning strongly recommends preventative maintenance for your commercial HVAC equipment to minimize downtime, maximize workplace productivity and increase energy efficiency. Through annual tune-ups, our NATE-certified technicians will optimize your equipment performance, extend system longevity and eliminate major repairs.

Reach Out to Us for a Free Estimate Today!

Lea Heating & Air Conditioning looks forward to providing you with the highest standards of comfort control for your family and business. Call us at 847-305-2800 to speak with an experienced and courteous member of our service team or visit us at our offices and showroom in East Dundee. We have working models on display and are always happy to sit down and discuss your expectations and requirements for temperature control and air quality.

Commercial HVAC Near Me, Commercial HVAC, Commercial Heating & Commercial Air Conditioning Algonquin, IL, Carpentersville, IL, Elgin, IL, Hoffman Estates, IL, Sleepy Hollow, IL & West Dundee, IL

Roof Top Units in Algonquin, IL | Commercial HVAC Near Me Carpentersville, IL

Roof Top UnitsIndustrial HVAC ∴ West Dundee, IL ∴ Carpentersville, IL ∴ Elgin, IL

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What others say

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

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

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

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

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

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

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.

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

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