Shannon Enterprises has developed a closed-cell insulation system called the Acoustic Shield. The insulation reduces sound emanating from heating, cooling, and power-generating components found at schools and medical campuses, onboard marine vessels, inside manufacturing facilities, and near retail and residential locations. Company officials said the Acoustic Shield gives engineers, specifiers, and facility managers a high-value offering for insulating compressors, pumps, ducting, motors, and more. Each shield is manufactured to last 15 years with payback periods ranging six to 24 months. Each shield is OSHA-compliant and ASTM-tested.