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Crystal Lake, Illinois’ Expert HVAC Contractor

Welcome to Lea Heating & Air Conditioning, the finest HVAC contractor in Crystal Lake, IL. As a locally owned business, we understand the importance of reliable heating, ventilation, and air conditioning systems to the homes and businesses of Crystal Lake. In this region, the summers can get uncomfortably hot, and the winters can be bitterly cold. At Lea Heating & Air Conditioning, we ensure your HVAC systems are performing optimally to withstand these weather extremes, so that you and your family can enjoy perfect temperatures all year round.

Lea Heating & Air Conditioning takes pride in offering comprehensive HVAC services. Our team of certified professionals are well-versed in maintenance, repair, and installation of all major makes and models of HVAC systems. Whether you’re faced with a malfunctioning air conditioner in the middle of summer or a faulty furnace in peak winter, we’re here to provide speedy, efficient, and cost-effective solutions. Additionally, we offer preventive maintenance services to keep your HVAC system running smoothly and to increase its lifespan, saving you from expensive repairs or replacements.

Certified HVAC Contractors from Lea Heating & Air Conditioning

At Lea Heating & Air Conditioning, we understand that an efficient HVAC system is integral to your home comfort. Hence, we pick our HVAC contractors carefully. All our technicians are state-certified and licensed, ensuring that you receive nothing but the best service. We are adept at diagnosing issues quickly and accurately, offering the most effective solutions tailored to your needs. Plus, our technicians stay updated with the latest technologies and methodologies in the HVAC industry.

Being a community-centered HVAC contractor, we value our relationships with the Crystal Lake community. We are proud to be a part of this vibrant community, and we strive to serve our neighbors with integrity and transparency. Our commitment to utmost customer satisfaction has earned us a reputation as the preferred HVAC service provider in Crystal Lake, IL.

Are you in need of exceptional HVAC services in Crystal Lake, IL? Look no further than Lea Heating & Air Conditioning. Let us take care of your HVAC needs so you can enjoy a comfortable and air-quality-optimized living or working space, no matter what the weather is outside. You can reach out to us 24/7. We’re always ready to ensure your HVAC system is in top shape. For reliable, professional, and friendly HVAC services, call Lea Heating & Air Conditioning today!

Furnace Repair, HVAC Near Me & AC Service in Crystal Lake, IL

Heating Installation in Crystal Lake, IL | AC Service

Heating InstallationFurnace RepairHVAC Near MeAC Service ∴ Crystal Lake, IL

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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

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 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 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

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 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.

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

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

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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