• 847-716-2157
  • Five Star Guarantee
  • Year Established: 2008
  • Family Owned & Operated
  • Financing Available
  • Free Estimates
  • Employees Drive Marked Vehicles
"Hey, we're homeowners too, so we get how overwhelming it can be to call a service provider when something isn't working right. With so many HVAC companies out there, you deserve one that treats you like family and cares about your comfort and safety. That's exactly what we do. Our team is dedicated to honesty and integrity, offering fair pricing, quality workmanship, licensed technicians, and friendly service. We look forward to working with you to find the best and most comfortable solutions for you and your family."

Mark Portuese, Owner
Principal Owners / Key Managers
Mark Portuese, Owner
Five Star Guarantee
We stand behind every Five Star Rated company with Our Guarantee. We've done the research for you and identified the best home service pros in your neighborhood.
Homeowner Reviews

“I highly doubt we will be calling anyone else for our future needs. As a corporate trainer by profession, I can say with full confidence these guys are top-notch with their customer experience.”

“The gentleman was knowledgeable and very professional. I highly recommend On the Mark for all your HVAC needs and services.”

  • 847-716-2157
  • Five Star Guarantee
  • Year Established: 2008
  • Family Owned & Operated
  • Financing Available
  • Free Estimates
  • Employees Drive Marked Vehicles
"Hey, we're homeowners too, so we get how overwhelming it can be to call a service provider when something isn't working right. With so many HVAC companies out there, you deserve one that treats you like family and cares about your comfort and safety. That's exactly what we do. Our team is dedicated to honesty and integrity, offering fair pricing, quality workmanship, licensed technicians, and friendly service. We look forward to working with you to find the best and most comfortable solutions for you and your family."

Mark Portuese, Owner
Principal Owners / Key Managers
Mark Portuese, Owner
Services Offered
Residential and light commercial service, repair, and installation
Services for heat pumps, air conditioners, and furnaces
Indoor air quality products and services
Ductwork repairs and modifications
FREE estimates on new equipment
Financing available
We do not service boilers, chillers, or refrigeration units.
Insurance
General Liability & Workers' Compensation
Warranties / Guarantees
Honest and upfront pricing
Customer satisfaction guarantee
Recognitions
Over 700 5-star reviews
North American Technician Excellence (NATE) certified technician
2024 Daily Herald Readers' Choice Nominee
A+ Rated and Accredited with the BBB
Member of Hoffman Estates Chamber of Commerce and Industry