For high-quality HVAC systems, and innovative solar products that provide superior factory support and design, trust in the experts at Plastic Systems Inc. Since 1991 we have offered great equipment backed by 28 years of experience, and have been ranked in the top 5 for national sales each year for our major product lines. We are located in the southeast section of Mercer Island, just 3 miles south of Interstate 90. Contact us on Mercer Island, Washington, for residential and commercial HVAC systems, boilers and hydronic heating, and indoor air quality systems.