As of publication, contractors on this list are in good standing with the Mass Save program and have been vetted for professional credentials. A contractor’s presence on this list does not constitute approval, certification, or any other form of endorsement on the part of the Center for EcoTechnology (CET). Also note that CET does not receive any compensation or other benefits if a customer uses a contractor on this list. Customers are not obligated to use a contractor on this list. To qualify for rebates, customers and contractors must comply with the rebate processing rules and equipment specifications set by their MLP.