Vernier Sales & Service Inc.

Vernier Sales & Service is an HVAC and refrigeration contractor that works mainly on commercial equipment, including heating, cooling, air quality, commercial refrigeration and water heaters. The company says much of its work is with retirement centers, apartment buildings, financial institutions and hospitals, and it has been in business for over 45 years.

The company is family owned and operated, fully insured and licensed, and it says every employee has passed background checks. Its phone line is open weekdays with 24-hour commercial emergency service, and it serves St. Louis and surrounding areas, with a focus on Monroe County. Its listed location is Waterloo, Illinois, with a mailing address in Columbia.