About Us

A.S.I. Mechanical is a private local firm providing PLUMBING, PIPING & HVACR installation, and design services in ARIZONA. Our company specializes in new construction and renovations, utilizing the design build concept to minimize costly delays, shorten a project’s timeline and maximize a client’s budget. The A.S.I. management team has over 60 years of experience, quickly becoming the leading HVAC mechanical subcontractor Statewide. Throughout our history, we have been known as the most innovative, forward thinking, and experience driven mechanical construction firm in the United States, with awards to show for it. Founded by Ed Dewees in 2005, his combination of education and industry experience has created a unique approach to mechanical construction; a practice founded upon experience, quality, performance and value. The A.S.I portfolio of successful projects demonstrates the company’s level of experience in both the commercial and industrial sectors. A.S.I. Mechanical provides an inventive plan for mechanical systems that assist clients in moving towards fully sustainable buildings. At project conception, A.S.I. Mechanical provides clients with a strategy for design to gain the highest accreditations for LEED®, and GREEN rated buildings. This approach then forms the basis for the project team. The result is more sustainable results, often at little extra cost. The Anderson Shaw Industries combination of education and industry experience has created a unique approach to mechanical construction; a practice founded upon experience, performance and value. The company’s vision is relationship based; provide owners and general contractor with exceptional quality at competitive prices. Exceptional quality is delivered by exceptional people who continue to earn the trust and commitment that contributes to our success. 

At A.S.I. Mechanical, we don’t just install systems — we build reliable, no-excuses mechanical solutions designed for Arizona’s toughest conditions. From precision HVAC and hydronic systems to mission-critical piping, our work is engineered once, installed right, and built to last. 

ASI Mechanical delivers engineered Plumbing, Hydronics & HVAC systems built for performance, efficiency, and long-term reliability. Our work is driven by sound engineering, disciplined installation practices, and real-world field experience — not shortcuts.

• Chilled Water Systems (Primary / Secondary / Variable Flow) 
• Water-Cooled Chillers & Cooling Towers 
• Pumping Systems & Mechanical Rooms 
• Hydronic Piping, Valves, and Controls Integration 
• ASHRAE • ASME • USACE-Compliant Installations