24/7/365 Service

Powering Business As Usual

For data centers and other commercial/industrial facilities in Chicagoland, Northern Illinois and Northwest Indiana, ThermFlo is the premier source for HVAC, electrical and generator service. We are also the only factory-authorized service provider for Liebert/Vertiv thermal management products and Generac industrial power systems in our service area.

Our highly trained service technicians are available for emergency response 24 hours a day, 7 days a week, 365 days a year.

To place a service request

When Placing a service request, please provide:

  • Company information: your name, company name, address and phone number
  • A brief description of the problem
  • Site information: site contact name, company name, address and contact phone number
  • Bill-to information (if different from site information: company name, address and phone number)


7:00 am - 5:00 pm, Monday through Friday Service requests can be placed using phone, fax or email.

Phone: 847-353-5353 Fax: 847-541-0272 [email protected]


Including Holidays - Service requests can be placed by phone, and will be routed to our call desk through our 24-hour answering service.

Phone: 847-541-0029