Metropolitan Air Technology (M.A.T.), a U.S. Based, ISO 9001:2008 certified company, has been manufacturing innovative air flow management products for over 20 years. Our long history of innovation is complemented by our strong product research and development program and all our products are rigorously inspected and tested before being released into the market place. At M.A.T. we believe intelligent engineering increases the quality of our patented technology, reduces costs and ultimately provides value to our global customer base. We are a world-class HVAC supplier committed to increasing HVAC system performance and efficiency which is why many of our products help building designers satisfy LEED requirements and why we're a proud Member of the US Green Building Council. Our mission is to offer innovative air flow management products of the highest quality that deliver value to our global customer base of building owners, design engineers, and contractors. We will fulfill this mission through our commitment to product innovation and development, product and service quality, and a pledge to operate at the highest legal, ethical, and environmental standards. Manufacturing products that contribute to improved energy efficiency and occupant comfort is an important motivation for us. As such, we are proud to be a member of the U.S. Green Building Council, supporting the mission of LEED®. Our products are installed in all types of projects from condominiums, airports, museums, laboratories, hospitals, and stadiums. Our dampers are patented in the US and Canada. International patents are pending. MAT is a Steelhead company.