Mountain Air Systems is a full-service HVAC mechanical contractor serving all of Vermont and parts of New Hampshire and New York.

We specialize in HVAC and custom mechanical systems design and installation that we back with our guaranteed Preventative Maintenance Agreement. We take a holistic approach to designing, installing and servicing mechanical systems to reduce costs, boost long-term efficiency and maximize equipment longevity. We are the only company in Vermont that offers this exceptional level of service, support and peace of mind to customers in Vermont, New Hampshire, and New York.

Additionally, our team of custom metal fabricators can deliver custom metal fabrication and specialty welding projects in carbon steel, sheet metal, stainless steel, aluminum, and other metals.

As a second-generation, Vermont-based family-run business, we believe in the value of long-term relationships and see our customers' satisfaction as the only important indicator of our success