Talk to us! Find out how to make your multifamily property Home Sweet (er) Home for new and existing tenants. Call 1-800-594-7277. Mention code CMM when you call. This program is available to property owners or managers of an apartment or condominium complex located in Massachusetts containing 5 or more units per complex that has active National Grid residential gas and/or electric accounts. Measures are analyzed for eligibility on a project-by-project basis. Offer is subject to change or cancellation without notice. Some restrictions may apply. Savings and energy efficiency experiences may vary. ©2014 National Grid. t fficien E Energy- HOME SWEET HOME FOR MASSACHUSETTS MULTIFAMILY DWELLINGS AHEAD Own or manage a multifamily dwelling? National Grid provides generous financial rebates and incentives to help you make energy efficiency improvements.https://www1.nationalgridus.com/MultiFamilyMA-MA-RES