ESI is a fully Certified Asbestos, Lead, Mold and Indoor Air Quality testing firm servicing the Industrial, Commercial, Institutional and residential sectors. Additionally ESI, offers a full line of Energy saving solutions designed to save dollars and reduce energy needs. ESI is a National Insulation Association (NIA) Certified Industrial/Commercial Insulation inspection firm, let use show you where you can save money and reduce you carbon footprint with a return on investment of as little as three months.