Mountain Mechanical NY, Inc. is a factory-certified HVAC contractor serving Long Island and the Tri-State area with over 35 years of industry experience. We specialize in commercial, industrial, and multi-family heating and cooling system design, installation, retrofits, and maintenance. Our licensed technicians self-perform all work to meet strict code and efficiency standards. From new construction and system modernization to energy-efficient upgrades and complex mechanical projects, we deliver reliable, industry-proven solutions built for long-term performance.