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 thermal management products and Generac commercial and 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 servicecoordinators@thermflo.com


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