When the police department went from propane to natural gas, utility bills dropped about 7 percent.
“We’ve been pretty consistent with our energy efforts,” Fowler said.
The town’s other library, Taylor Library in East Derry, also saw energy-saving changes. In 2013, town officials approved measures to put cost-saving measures into place at the tiny library, including replacing storm windows, sealing leaks, insulation work and adding energy-efficient light bulbs — simple changes that keep the building cooler in summer and warmer during the winter.
Another historic building in town, Veterans Hall, also got major upgrades. The town used Energy Efficiency Community Block grant funding to give the 85-year-old building a major face-lift.
The building got exterior improvements, roof repairs, new energy-efficient windows and doors, and a more efficient boiler and radiant heat system.