Mason City was less than a quarter century old when the business now known as Mechanical Air Systems Company was founded in 1877. In 1911, Ray E. Pauley

• Engineering and Design Services
• 24-hour Heating and A/C Service
• Self-Contained Gas and Electric Rooftop Units

Mechanical Air Systems Company
MechanicalAir@mechair.com
2417 South Federal Ave.
Mason City, IA 50401
641-423-7032 (Phone)
641/424-4376 (Fax)