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Since 1982, EFI has supplied energy efficient products to Utilities, Weatherization Programs, Energy Service Providers, Contractors, Property Managers, and Colleges/Universities.

We take pride in our product knowledge, technical expertise, and our warehousing and logistics.

Hours and Locations:

MA Office: Monday through Friday, 8 AM to 5 PM Eastern
WI Office: Monday through Friday, 8 AM to 5 PM Central