In Illinois, HVAC companies play a crucial role in maintaining comfortable indoor environments. These businesses range from small, family-owned service providers to large-scale contractors, offering services such as installation, repair, and maintenance of heating and cooling systems. The industry is increasingly focusing on energy efficiency and innovative technology, driven by growing consumer demand for sustainable solutions. As the market matures, HVAC companies are integrating smart systems for better control, which not only enhances user experience but also contributes to serious energy savings. This shift reflects broader trends in urban climate control amid changing weather patterns.


This list comprises 19 HVAC companies of varying sizes, headquartered in Illinois. They range from small firms with less than ten employees to larger operations employing hundreds. Many have impressive histories, having been founded as far back as 1949. Their specializations include residential and commercial services, indoor air quality improvements, and energy-efficient HVAC solutions, showcasing a blend of experience and innovation across different sectors.


Read on to discover more about the top HVAC companies in Illinois.


Top 19 HVAC Services Companies in Illinois


1. HVAC Solutions, Inc.

  • Website: hvacsolutions.com
  • Ownership type: Private
  • Headquarters: Lansing, Illinois, United States (USA)
  • Employee distribution: Puerto Rico 33%, India 33%, United States (USA) 33%
  • Founded year: 2008
  • Headcount: 1-10
  • LinkedIn: hvac-solutions-inc.

HVAC Solutions, Inc. is a private company based in Lansing, Illinois, founded in 2008. The firm specializes in heating, ventilating, and air conditioning products and solutions, catering primarily to contractors and engineers. They offer a comprehensive range of HVAC products for both commercial and residential applications, including air turnover units, chillers, and geothermal heat pumps, among others. The company prides itself on providing technical expertise and support, ensuring that clients can meet their project requirements effectively. HVAC Solutions also emphasizes training and education, hosting events and workshops to enhance the knowledge of their customers. Their team consists of experienced professionals who bring a wealth of industry knowledge, further solidifying their role in the HVAC sector. The company operates without reported funding, indicating a self-sustaining business model.


2. Energy Services Air Conditioning & Heating Co.


Energy Services Air Conditioning & Heating Co. is a private HVAC service provider based in Naperville, Illinois, with a history dating back to 1976. The company specializes in a wide array of HVAC solutions, including air conditioning and heating installation, repair, and maintenance. They also offer services aimed at improving indoor air quality, such as duct cleaning and air purification systems. Catering to both homeowners and businesses, Energy Services is committed to delivering reliable heating and cooling systems that ensure comfort and efficiency. The company has built a reputation for quality service, evidenced by their A+ rating from the Better Business Bureau and accolades like the Carrier President’s Award. Their team of trained technicians is available for emergency services, reflecting their dedication to customer care and operational excellence. With a focus on proactive maintenance and energy-efficient solutions, Energy Services continues to play a significant role in the HVAC industry.


3. A to Z Sales & Marketing

  • Website: atozsales.net
  • Ownership type: Family Owned
  • Headquarters: Downers Grove, Illinois, United States (USA)
  • Employee distribution: United States (USA) 67%, Sri Lanka 33%
  • Founded year: 1970
  • Headcount: 1-10
  • LinkedIn: a-to-z-sales-inc.

A to Z Sales & Marketing, based in Downers Grove, Illinois, is a family-owned company that has been a significant player in the HVAC industry since its founding in 1970. The company specializes in representing a variety of manufacturers, catering to distributors, contractors, and engineers. Their mission revolves around enhancing indoor air quality and comfort, offering a broad spectrum of HVAC products and services. With a workforce of around 18 employees, A to Z Sales & Marketing leverages its extensive experience to provide application and technical support, ensuring that their partners can effectively meet the needs of their customers. The company operates primarily in the Midwest, covering territories in Illinois, Indiana, Wisconsin, and several other states. Their commitment to fast and responsive service, along with a focus on sustainable living, positions them as a trusted resource in the HVAC sector.


4. Climate Pros, LLC

  • Website: climatepros.com
  • Ownership type: Venture Capital
  • Headquarters: Glendale Heights, Illinois, United States (USA)
  • Employee distribution: United States (USA) 99%, Other 1%
  • Latest funding: $550.0M, May 2023
  • Founded year: 2006
  • Headcount: 1001-5000
  • LinkedIn: climate-pros-inc

Climate Pros, LLC is a commercial refrigeration and HVAC service provider based in Glendale Heights, Illinois. Founded in 2006, the company has grown to employ over 566 individuals and operates nationwide, focusing on sectors such as retail, refrigerated storage, and biomedical. Climate Pros offers a comprehensive range of services, including equipment repair, installation, and maintenance, ensuring efficient operation of refrigeration systems. The company prides itself on customer satisfaction and innovative solutions, leveraging cutting-edge technology to enhance service delivery. Recently, Climate Pros secured $550 million in funding, underscoring its growth trajectory and commitment to expanding its capabilities. With a strong emphasis on training and development, Climate Pros invests in its workforce to maintain high service standards and adapt to evolving industry demands.


5. Thermosystems, LLC.

  • Website: thermohvac.com
  • Ownership type: Private
  • Headquarters: Elmhurst, Illinois, United States (USA)
  • Employee distribution: United States (USA) 91%, India 7%, Brazil 2%
  • Founded year: 2000
  • Headcount: 51-200
  • LinkedIn: thermosystems-inc

Thermosystems, LLC, based in Elmhurst, Illinois, is a commercial HVAC service provider that has been operational since 2000. The company specializes in the design, installation, and maintenance of HVAC systems, serving clients across multiple sectors, including education, healthcare, and government. With a workforce of approximately 90 employees, Thermosystems emphasizes customized solutions and aftermarket parts to ensure optimal performance of HVAC systems. They have developed strong relationships with over 25 manufacturers, allowing them to offer a wide range of equipment and services. Their commitment to sustainability and energy efficiency is evident in their support for advanced technologies, such as geothermal systems and smart HVAC controls. Thermosystems also provides a preventative maintenance agreement to help clients reduce unexpected breakdowns and extend the lifespan of their equipment. Their proactive approach and dedication to customer service position them as a trusted partner in the HVAC industry.


6. American Weathermakers


American Weathermakers, based in Northbrook, Illinois, has been a trusted name in HVAC and plumbing services since its founding in 1949. This family-owned business specializes in a variety of residential services, including air conditioning repair, heating installation, and comprehensive plumbing maintenance. With a workforce of approximately 27 employees, the company prides itself on delivering high-quality workmanship and exceptional customer service. They offer a Comfort Club maintenance program, which ensures regular check-ups and promotes system efficiency. American Weathermakers also provides 24/7 emergency services, catering to urgent customer needs. Their focus on transparency and honest pricing further solidifies their reputation in the Chicagoland area, where they have built a loyal customer base over decades of operation.


7. Gunn & Pegelow

  • Website: gunnpegelow.com
  • Ownership type: Private
  • Headquarters: Libertyville, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1954
  • Headcount: 11-50
  • LinkedIn: gunn-%26-pegelow-inc

Gunn & Pegelow, based in Libertyville, Illinois, has been a prominent HVAC manufacturer's representative since its founding in 1954. The company specializes in heating, ventilation, and air conditioning solutions, representing a range of manufacturers across several states, including Illinois, Wisconsin, Upper Michigan, Indiana, and Eastern Missouri. With a team of 23 employees, they provide expertise in selecting and implementing efficient HVAC systems tailored to the needs of construction and facility management sectors. Their commitment to ongoing field support and training has established them as a trusted partner for both manufacturers and customers. Gunn & Pegelow has been involved in notable projects, such as the installation of HVAC systems in the Harley Davidson Wrigleyville showroom and the Trade Hotel in Milwaukee, demonstrating their capability in handling complex HVAC requirements. Their focus on quality equipment and customer service further solidifies their position in the HVAC industry.


8. Phoenix HVAC

  • Website: phoenixhvac4822.com
  • Ownership type: Private
  • Headquarters: Rolling Meadows, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2018
  • Headcount: 11-50
  • LinkedIn: phoenix-hvac4822

Phoenix HVAC LLC is an HVAC service provider based in Rolling Meadows, Illinois, founded in 2018. The company offers a wide array of services, including installation, repair, and maintenance of heating and cooling systems, catering to both residential and commercial customers. Their service portfolio includes air conditioning, furnace repair, boiler services, and indoor air quality solutions. Notably, Phoenix HVAC has carved out a niche in the cannabis cultivation sector, providing specialized HVAC systems designed to meet the unique needs of growers. This focus on a specific market segment, combined with their commitment to customer satisfaction, positions them as a relevant player in the HVAC industry. The company operates with a team of 11-50 employees, emphasizing a personalized approach to service. They have not reported any funding, indicating a self-sustained growth model.


9. Alpine Home Air


Alpine Home Air Products, based in Chicago, Illinois, is a private retail company that specializes in heating, ventilation, and air conditioning (HVAC) products. Established in 2002, the company has carved out a niche in the HVAC market by offering a comprehensive range of products, including air conditioning and heating systems, indoor air quality solutions, and essential installation supplies. Their customer base includes both homeowners looking for reliable HVAC solutions and contractors seeking quality products for their projects. Alpine Home Air emphasizes customer service, providing features such as same-day shipping and a user-friendly online shopping platform. They also offer tools like a system selector and sizing estimator to assist customers in making informed decisions. With a focus on energy-efficient products and a commitment to customer satisfaction, Alpine Home Air has built a solid reputation in the HVAC industry.


10. Reliable Mechanical

  • Website: reliable-mechanical.com
  • Ownership type: Family Owned
  • Headquarters: Champaign, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1902
  • Headcount: 51-200
  • LinkedIn: reliable-mechanical

Reliable Mechanical, a family-owned business based in Champaign, Illinois, has been serving the HVAC industry since 1902. The company specializes in providing a wide array of services, including heating, ventilation, air conditioning, plumbing, and roofing solutions. They cater to both residential and commercial clients throughout Central Illinois, ensuring comfort and safety in various properties. Reliable Mechanical is known for its commitment to quality service and customer satisfaction, operating with a focus on excellence. Their team is trained to handle emergency HVAC services and offers planned maintenance programs to extend the life of HVAC systems. This dedication to service and reliability has helped them maintain a strong reputation in the industry.


11. Green Air Care

  • Website: greenaircare.com
  • Ownership type: Private Equity
  • Headquarters: Buffalo Grove, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: June 2021
  • Founded year: 2001
  • Headcount: 51-200
  • LinkedIn: green-air-care

Green Air Care, based in Buffalo Grove, Illinois, is an HVAC service provider that has been operational since 2001. The company specializes in a variety of services, including heating, cooling, duct cleaning, and water heater maintenance, catering to both residential and commercial customers in the Chicagoland area. With a workforce of approximately 22 employees, Green Air Care emphasizes customer satisfaction, offering emergency services and free estimates for new installations. Their commitment to quality service is reflected in their positive customer reviews and their status as a Carrier Factory Authorized Dealer. This affiliation allows them to provide advanced HVAC solutions and maintain high standards in service delivery. Green Air Care's focus on energy efficiency and indoor air quality further underscores their role in the HVAC industry, making them a relevant player in the market.


12. Beloman

  • Website: beloman.com
  • Ownership type: Family Owned
  • Headquarters: Belleville, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1959
  • Headcount: 51-200
  • LinkedIn: bel-o-sales-and-service

Beloman, based in Belleville, Illinois, is a family-owned service company specializing in HVAC and plumbing solutions. Founded in 1959, the company has built a reputation for reliability and efficiency, serving both residential and commercial customers in the Metro East area. Their service offerings include air conditioning repair, furnace installation, and a variety of plumbing services. Beloman prides itself on its team of factory-certified technicians, ensuring that customers receive knowledgeable and skilled service. The company is also recognized for its community involvement and has received multiple local and national awards for its service excellence. With a focus on customer comfort and satisfaction, Beloman has become a trusted name in home comfort solutions in the region.


13. Althoff Industries

  • Website: althoffind.com
  • Ownership type: Family Owned
  • Headquarters: Crystal Lake, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1961
  • Headcount: 51-200
  • LinkedIn: althoff-industries

Althoff Industries, operating under the name Althoff Home Services, is based in Crystal Lake, Illinois. Founded in 1961, the company has built a reputation for providing comprehensive HVAC, plumbing, and electrical services. They serve both residential and commercial customers, emphasizing quality and customer satisfaction. Althoff offers a variety of services, including air conditioning and heating installation and repair, indoor air quality solutions, and plumbing services. Their technicians are trained and certified, ensuring that they meet industry standards. The company also promotes preventative maintenance through membership programs, which help clients maintain their systems efficiently. Althoff Industries has not reported any funding, indicating that it operates as a self-sustained family business.


14. Able Distributors

  • Website: abledistributors.com
  • Ownership type: Private
  • Headquarters: Chicago, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1980
  • Headcount: 11-50
  • LinkedIn: able-distributors

Able Distributors, based in Chicago, Illinois, has been a prominent HVAC supplier since its inception in 1980. The company specializes in providing a comprehensive range of heating, ventilation, and air conditioning solutions tailored for contractors in the Chicagoland area. Their product offerings include essential equipment such as furnaces, air conditioners, and heat pumps, alongside installation and maintenance services. This ensures that contractors have access to the necessary tools and support for their projects. Able Distributors also emphasizes customer satisfaction, as evidenced by their commitment to reliable inventory and thoughtful product selection. They actively engage with the HVAC community through training programs, promotional events, and a user-friendly online shopping platform, further solidifying their role in the industry. With a dedicated team and multiple branches, Able Distributors continues to serve as a key resource for HVAC professionals in their region.


15. Elite Air Inc.

  • Website: eliteairinc.net
  • Ownership type: Private
  • Headquarters: Carol Stream, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2006
  • Headcount: 11-50
  • LinkedIn: elite-air-carol-stream

Elite Air Inc. is an HVAC service provider based in Carol Stream, Illinois, specializing in heating, air conditioning, and indoor air quality solutions. Established in 2006, the company caters to both residential and commercial clients, offering a comprehensive suite of services that includes repairs, replacements, and maintenance. With a workforce of 32 employees, Elite Air Inc. emphasizes customer satisfaction and strives to create efficient and comfortable indoor environments. They are fully insured, licensed, and bonded, ensuring peace of mind for their clients. The company is recognized for its commitment to quality service, as evidenced by its partnerships with well-known brands such as Trane, Goodman, and Honeywell. Elite Air Inc. also provides financing options and guarantees their work, making them a trustworthy choice for HVAC needs in their service area.


16. Air Comfort

  • Website: aircomfort.com
  • Ownership type: Corporate
  • Headquarters: Broadview, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: April 2021
  • Founded year: 1935
  • Headcount: 51-200
  • LinkedIn: air-comfort-corporation

Air Comfort, based in Broadview, Illinois, has been a significant player in the HVAC industry since its founding in 1935. Originally starting as an engineering company and equipment distributor, it has evolved into a full-service mechanical contractor. The company specializes in a wide array of HVAC services, including emergency repairs, preventative maintenance contracts, and system retrofitting. They serve various sectors, such as commercial real estate, healthcare, and manufacturing, ensuring optimal indoor air quality and system efficiency for their clients. With a team of licensed mechanical engineers and installation specialists, Air Comfort is dedicated to providing customized solutions that enhance the performance and longevity of HVAC systems. Their commitment to customer service is reflected in their 24/7 emergency support and proactive maintenance strategies, which help businesses maintain operational continuity. Air Comfort's extensive experience and focus on quality make it a relevant choice for businesses looking for dependable HVAC solutions.


17. BASE Solutions

  • Website: basesolutions.com
  • Ownership type: Private
  • Headquarters: Elmhurst, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2019
  • Headcount: 51-200
  • LinkedIn: base-solutions-york

BASE Solutions, based in Elmhurst, Illinois, specializes in HVAC services, focusing on replacement and repair solutions for both residential and commercial clients. Founded in 2019, the company has quickly established itself in the industry by not only providing essential heating and cooling services but also by offering training programs aimed at HVAC professionals. This commitment to education reflects their dedication to improving service quality and operational efficiency within the HVAC sector. Operating through a network of dealers, BASE Solutions ensures that their products and services are accessible, further solidifying their role in the market. With a workforce of 51-200 employees, they are positioned to make a significant impact in the HVAC industry, despite their relatively recent entry.


18. GT Mechanical

  • Website: gtmechanical.com
  • Ownership type: Family Owned
  • Headquarters: Homer Glen, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1991
  • Headcount: 11-50
  • LinkedIn: gt-mechanical-inc

GT Mechanical, based in Homer Glen, Illinois, has been a family-owned enterprise since its founding in 1991. With a dedicated team of 38 employees, the company has built a solid reputation in the HVAC industry, particularly in the Chicagoland and Northwest Indiana areas. They offer a comprehensive range of services, including design, installation, and maintenance of HVAC systems tailored to commercial, industrial, and institutional clients. The company prides itself on its commitment to energy efficiency and optimal system performance. GT Mechanical operates with a focus on safety, ensuring that all technicians are well-trained and adhere to strict safety protocols. Their projects span various sectors, showcasing their capability to manage both straightforward and complex HVAC challenges. The leadership of Tim and Greg Uher, who bring decades of experience, further enhances the company's credibility and operational effectiveness.


19. Braeburn Systems LLC

  • Website: braeburnonline.com
  • Ownership type: Private
  • Headquarters: Montgomery, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2001
  • Headcount: 11-50
  • LinkedIn: braeburn-systems-llc

Braeburn Systems LLC, founded in 2001 and based in Montgomery, Illinois, is a manufacturer dedicated to providing HVAC solutions. The company specializes in a range of products, including digital and electro-mechanical thermostats, humidity controls, and zoning systems tailored for both residential and commercial use. Their offerings are designed to enhance energy efficiency and comfort, catering to the needs of professional contractors and HVAC distributors. Braeburn's corporate headquarters serves as the hub for customer service, technical support, sales, marketing, and engineering, ensuring a comprehensive approach to their operations. The company emphasizes a 'Quality by Design' philosophy, focusing on rigorous engineering and reliability testing to deliver dependable products. With a global distribution network, Braeburn Systems is positioned to serve a wide array of clients, reinforcing its role in the HVAC industry.



HVAC Services Insights: Key Companies in Illinois


CompanyHeadquarterSizeFoundedOwnership
HVAC Solutions, Inc.Lansing, Illinois, United States (USA)1-102008Private
Energy Services Air Conditioning & Heating Co.Naperville, Illinois, United States (USA)11-501976Private
A to Z Sales & MarketingDowners Grove, Illinois, United States (USA)1-101970Family Owned
Climate Pros, LLCGlendale Heights, Illinois, United States (USA)1001-50002006Venture Capital
Thermosystems, LLC.Elmhurst, Illinois, United States (USA)51-2002000Private
American WeathermakersNorthbrook, Illinois, United States (USA)51-2001949Family Owned
Gunn & PegelowLibertyville, Illinois, United States (USA)11-501954Private
Phoenix HVACRolling Meadows, Illinois, United States (USA)11-502018Private
Alpine Home AirChicago, Illinois, United States (USA)51-2002002Private
Reliable MechanicalChampaign, Illinois, United States (USA)51-2001902Family Owned
Green Air CareBuffalo Grove, Illinois, United States (USA)51-2002001Private Equity
BelomanBelleville, Illinois, United States (USA)51-2001959Family Owned
Althoff IndustriesCrystal Lake, Illinois, United States (USA)51-2001961Family Owned
Able DistributorsChicago, Illinois, United States (USA)11-501980Private
Elite Air Inc.Carol Stream, Illinois, United States (USA)11-502006Private
Air ComfortBroadview, Illinois, United States (USA)51-2001935Corporate
BASE SolutionsElmhurst, Illinois, United States (USA)51-2002019Private
GT MechanicalHomer Glen, Illinois, United States (USA)11-501991Family Owned
Braeburn Systems LLCMontgomery, Illinois, United States (USA)11-502001Private


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