WinnCompanies joined with federal, state and local officials to open one of the first all-electric mixed-income multifamily properties in Massachusetts. The $39.2 million adaptive reuse development’s fossil-fuel-free design is expected to use 46 percent less energy and emit 33 percent fewer greenhouse gases than a typical gas-fired multifamily structure. The energy-efficient design, including heat pumps and energy recovery systems, will save 177 metric tons of avoided greenhouse gas emissions each year.