About Us

Thank you for considering Northeast Illinois Service Company, Inc. (NISCO) as a potential service provider for your HVAC-R, handyman, and facilities maintenance needs. We are a full-service Heating, Ventilation, Air Conditioning and Refrigeration service, installation, and consulting company.

Our History

Family owned and managed, NISCO was originally established in 1990 as an HVAC-R service and repair company, providing Heating and Air Conditioning services to the Greater Chicagoland area, Northwest Indiana, and Wisconsin. Since then, our services have expanded to include handyman services, remodeling, and facilities maintenance services.

The senior management at NISCO prides itself in having over 90 years of combined experience in the HVAC-R and facilities maintenance fields. It is this experience that gains us the trust of some of the largest and well-known clients in the region.

Core Services

NIHAC is a full-service Property Services company. Heating and Air Conditioning, construction, remodeling, handyman services, and facilities repair and maintenance.

From residential service calls to complex commercial Roof Top Unit installations, furnace installations to commercial retail build-outs, our trained and EPA-certified technicians have you covered.

Our Customers

Since its inception, NISCO has held a truly diverse customer base from residential to retail, food service to health care. Our current client list includes, among many others, residential customers, major coffee house chains, medical centers, places of worship, restaurant chains, microbreweries, and shopping centers.

Having virtually no advertising program in place, nearly all our clients actively seek us out through positive word-of-mouth referrals.

Customer Reviews

Don't take just our word for it. Actual quotes from actual customers.





Residential and commercial HVAC-R service, installation, and repair.

Service and Repair

Our primary focus is on service and repair, and we operate on the highest level of customer approval and satisfaction, maintaining excellent communication with the client from the time a service call is received until the problem is resolved.


From routine home ac systems to complex commercial Roof Top Unit installations, our trained and EPA-certified technicians have you covered

Preventive Maintenance

Having your HVAC-R equipment checked out and maintained periodically can increase its reliability by catching potential problems before they become real problems.

Consulting / Designing Systems

Our goal is problem solving and helping to prevent future mechanical problems through extensive troubleshooting and conscientious Preventive Maintenance. Furthermore, the NIHAC team will work directly with you to execute a strategy to meet your unique HVAC-R challenges.


Business Clients


Customer service is our top priority and we operate on the highest level of customer approval and satisfaction. We at NISCO understand that in such a highly competitive market, you have a choice.
NISCO is committed to providing you with only the most qualified technicians to work at your locations. We appreciate your business, and we will make every effort to meet and hopefully even exceed your expectations.


By utilizing NISCO as an HVAC-R resource, you can depend on professional and responsive service. We provide our clients with extra value because we handle all the headaches of maintaining your equipment and following a proven system of conscientious service and Preventive Maintenance.
No customer is ever considered too big or too small. Let NISCO save you valuable time and money by handling all the chores of maintaining your HVAC systems.


NISCO’s Preventive Maintenance (PM) program is a fully comprehensive program to clean, maintain, and inspect your HVAC-R equipment on a regular basis. Whether you operate from one location or manage multiple locations, we can design a tailor-made PM program specifically for you.



With a Heating & Air Conditioning Preventive Maintenance (PM) Inspection program in place, here are some, but not all of the check points that may be included after your initial equipment assessment.

Check heat operation

Clean return air grills

Check refrigerant pressures

Check air conditioning operation

Clean condenser coils as needed

Inspect contactors and controls.

Check blowers and belts. Change belts as needed.

Clean evaporator coils, condensate pans, and traps

Change filters as needed

Pay your invoices online. All major credit cards accepted.

Log into your NIHAC Customer Portal to review your invoices and pay your bill any time. If you haven’t received your customer login info yet, please contact us below so we can get you started today. To pay an invoice, you will need to download or open the “pdf” document and follow the “pay online” link inside.


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Contact Us

If you have any questions or would like to schedule a service call, feel free to contact us via one of the options below. We can be reached 24 hours a day by telephone, postal mail or email.

24-hour emergency service

 Northeast Illinois Service Company, Inc. will always be available for you for all your Heating and Air Conditioning, facilities maintenance, and handyman emergencies, no matter what time of day or day of week. Call us anytime to place an emergency service call.

With our emergency response calls, any after-hours or holiday rates that apply will be charged.


Our location

Centrally located between Chicago and Milwaukee, NIHAC is based in Waukegan, Illinois. It this this central geographic location that allows us to serve Illinois, Wisconsin, and Northwest Indiana..


Mailing Address

Address: 236 N. Genesee St.,

Waukegan, IL 60085

Phone: (847) 623-6700

Email: info@nihac.com

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