Owner & Founder

Jim Tesseneer

Founding Mountain Air Systems in 2003, Jim has served the Gallatin valley for almost 22 years now. Jim is dedicated and loyal to our customers and stands behind every install.

Co-Owner

Eli Gossack

​Joining Mountain Air Systems right out of high school, Eli has worked his way up to become a partner with Jim. Eli is now focused on providing quality systems and integrating new technology to improve your home comfort.

Install and Service

The Crew

This group of talented men have shown dedication to the trade and continue to demonstrate their skills with quality and care on all system installs.