Welcome to the EFI Mass Save Gas Product Offer

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Please log in to enable product rebates. Get $25.00 to $100.00 (or more) off thermostats, up to $10.00 off showerheads.


This online store offers thermostats and hot water-saving devices to eligible Massachusetts customers of participating natural gas utilities. Please first log in to enable product rebates.

Customers of participating and energy efficiency providers may also order energy efficient lighting and advanced power strip products through efi.org/masssave (If you are already logged in to this store you will need to log in again when you return).

And, remember to visit masssave.com for the latest information on other ENERGY STAR certified products. ENERGY STAR certified appliances and lighting save energy, save money, help conserve our natural resources, and protect our environment.