24/7 Emergency Service 847-305-2800

For all residential HVAC services, Lea Heating & Air Conditioning is the call that always exceeds expectations. From our 45 years of experience to the latest innovations in heating, cooling, ventilation, and indoor air quality, we elevate standards. Our consistent excellence in customer treatment, industry knowledge, and technician training has achieved our status as a Bryant Factory Authorized Dealer. By always going above and beyond, we have been further singled out with the Bryant Medal of Excellence and Circle of Champions.


Trustworthy HVAC Services

We at Lea Heating & Air Conditioning excel at our chosen field. Our selection of products lives up to our promises, delivering unmatched energy efficiency, control, comfort, and reliability through the most advanced technology. Ask us what’s new in temperature control and air quality. We can’t wait to share the benefits of options such as zone control, wifi connectivity, and adaptable-speed technology.

HVAC System Repair, Maintenance & Installation

Reach out to Lea Heating & Air Conditioning to schedule a free estimate on new installation, replacement, repairs, or maintenance at a time that’s perfect for you. We are punctual, take very good care of your property, and keep you informed. Our small team of NATE-certified professionals is drug-screened, background-checked, and includes an impressive resume of expertise. As a Comfort24-7 Provider, our work is backed by peace-of-mind guarantees, and we include 24/7 emergency availability throughout Elgin, Crystal Lake, Carpentersville, Algonquin, West Dundee, Sleepy Hollow, East Dundee, Lake in the Hills, and Hoffman Estates, IL. 

We offer a range of heating and cooling solutions, including:

HVAC Repair, Heating & Cooling, HVAC Service & HVAC Installation Algonquin, IL, Carpentersville, IL, Elgin, IL, Hoffman Estates, IL, Sleepy Hollow, IL & West Dundee, IL

Duct Repair Algonquin, IL | HVAC Repair Carpentersville, IL | Boilers Elgin, IL

Heat PumpsDuctless HVACBoilersDuct RepairAir Filters ∴ Hoffman Estates, IL ∴ Algonquin, IL ∴ Sleepy Hollow, IL

Have a question?

We are here to help.

Give us a call, or fill out the form below and we will get back to you as soon as possible!


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

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

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 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 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.

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 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

Write a review

Air Filters


Duct Repair

Commercial HVAC

Ductless HVAC

Heat Pumps

Water Heaters

Streamwood, IL

Barrington, IL

East Dundee, IL

Lake in the Hills, IL

Crystal Lake, IL

Bartlett, IL

Inverness, IL

Skip to content