CAMP HILL, Pa. — Three Rite Aid stores in New England have received Energy Star certification from the Environmental Protection Agency, the retail pharmacy chain said Monday.

The stores — located in Enfield, Conn.; Merrimack, N.H.; and Cranston, R.I. — have increased their energy efficiency by 25% through overhauls that include upgrades to store lighting, air-conditioning systems and energy management systems. These include low-wattage lighting, sensors that activate fans only when needed and air-conditioning units that use a refrigerant that’s less harmful to the environment.

According to the EPA’s Energy Star performance scale, a score of 50 represents average performance, while a score of 75 — which the Rite Aid stores achieved — indicates top energy performance.