Owner & Founder

Jim Tesseneer

Founding Mountain Air Systems in 2003, Jim served the Gallatin valley for over 22 years. While he himself has given the team more work so he can step back, he is still here as a loyal and dedicated founder.

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.