(815) 232-4519

About Us


We specialize in quality heating and air conditioning installation and repairs


By offering a full service of expert installation, maintenance, heating and air conditioning system repair, LEMANSKI HEATING AND AIR CONDITIONING technicians can help you keep your home energy-efficient and comfortable all year long.


Why Replace Your Heating or Cooling System?

- Many furnaces and air conditioning systems make poor use of our energy and natural resources.

- With the cost of utilities rising, you want to make sure that you get the most out of your heating and cooling dollars.

- As your heating or cooling system ages, it loses its ability to cool or heat your home and do so efficiently.


A new EPA energy star labeled high efficiency system, when properly sized and installed, can save up to 40% on your annual heating and cooling costs. Your investment in a more efficient system can keep your family comfortable even during the hottest or coldest days, while upgrading your existing system can save on energy usage. Whether you need new installation, routine maintenance or emergency repair service, you can depend on LEMANSKI Heating and Air Conditioning to do the job.


Your business is important to us.


We provide honest and fair consultation to all home owners.


We are here to serve you with the knowledge and quality that you deserve


Give us a call today and you will be glad you did!


Why Choose Lemanski?


Lemanski Heating & A/C has been serving Northwestern Illinois since 1991.

We offer a 24 hour emergency service 365 days a year if needed. NATE certified factory trained technicians are ready to serve you. We are a full service contractor offering new construction, remodeling, and repairs to most brands. We are a Chamber of Commerce member and operate a full sheet-metal shop for custom ductwork fabrications. Our team utilizes a computer assisted custom design & build system. We are licensed, bonded, and insured; offering high efficiency boilers, geothermal systems, air cleaners, and indoor air quality systems.


References are available upon request. We have a knowledgeable friendly office staff and a showroom open for your convenience. There are numerous financing options available to qualified buyers. We look forward to doing business with you soon!