About Us

FAMILY OWNED SINCE 1985

Liam O'Farrell, PE - President

Liam started working in the family business when he was still in high school. During the summers, he gained hands-on experience in the sheet metal, piping and preventive-maintenance aspects of the business. After high school, Liam attended Rensselaer Polytechnic Institute in Troy, NewYork, where he received his Bachelor of Science degree in Mechanical Engineering.

Liam joined Mountain Air as a full-time employee in 1992 and began learning the basics of HVAC design and project management. In 1997 Liam received his professional engineering license from the State of Vermont; he is also a registered professional engineer in New Hampshire. In 2005, Liam and his brother Tim purchased the company from their parents, Jack and Dede.

Today Liam is responsible for the overall leadership, operation and direction of Mountain Air Systems. He is dedicated to supporting his employees while continually honing the company's focus on customer service.

Email: lofarrell@masvt.com

Jack & Dede O'Farrell - Founders

Jack and Dede are from Chicago, Illinois, where they both graduated from Loyola University. After five years in the Air Force, living and traveling all over the country, they decided they wanted to relocate to the East Coast. So in 1972, Jack, Dede and their four children moved to Vermont. Jack worked for two local HVAC contractors as a service technician and service manager. In 1985, Jack and Dede decided to start their own HVAC service company, and thus, Mountain Air Systems, Inc. was born.

Originally Jack had two partners, Joe Monty and Toby Buxton. Toby's involvement with the company was brief, but Joe remained active with the company until 1992. By then, Tim and Liam were full-time employees and the groundwork for the family business was set. Business was good; Mountain Air had a trusted reputation, loyal customers and a workforce of skilled, happy employees.

At the end of 2005, Jack and Dede were both proud and happy to turn over the operations and ownership of Mountain Air Systems, Inc. to their capable and dependable sons, Tim and Liam. Jack and Dede remain on the Board of Directors and are active as consultants for the company. Most importantly, the culture of customer service that they established lives on and forms the foundation for the company that Mountain Air Systems is today.

Tim O'Farrell 

Tim began learning the HVAC trade by working alongside his father during summers off from school. After high school, Tim attended the State University of New York at Delhi where he studied HVAC/R and electrical controls and graduated with an Associates Degree in Occupational Studies.

Tim joined the family business full time in 1988 as a service technician and HVAC/R installer. Later, Tim moved inside the office as the Service Division's dispatcher and coordinator.

In 2005, Tim, along with his brother Liam, purchased Mountain Air Systems from Jack and Dede. Tim ran the Service Division from 2005 until his untimely passing in 2011.  Tim played a large roll in the formative years of Mountain Air Systems and helped grow the company to what it is today.  Tim is greatly missed by his entire family and all of the employees at Mountain Air who worked alongside him.