Mass Save® is an initiative sponsored by Massachusetts’ gas and electric utilities and energy efficiency service providers, including but not limited to, Columbia Gas of Massachusetts, Eversource, National Grid. The Sponsors of Mass Save work closely with the Massachusetts Department of Energy Resources to provide a broad range of services, incentives, trainings, and information encouraging energy efficiency that help residents and businesses manage energy use and related expenses. Homeowners and renters. Large and small business people. Building and trade professionals. We all have a role to play in creating more energy efficient communities. By making smart choices we can manage our energy costs, enhance the value and comfort of our homes, and reduce greenhouse gas emissions.