By Andreas Yilma, Staff Writer NAUGATUCK — The borough is one step closer to installing a combined heat and power (CHP) system at Naugatuck High School. The Board of Mayor and Burgesses Dec. 1 voted, 9-1, to enter into a lease agreement with Saulsbury Hill Financial, LLC, to pay for the project. The borough board and Board of Education previously approved installing the system. Under the plan, four CHP units will be installed in the school’s boiler room. Each unit has a natural gas engine that spins a generator which produces electricity with a byproduct of waste heat. The units will be connected to the boilers via a heat exchanger. The units will work in the first position and the boilers will be secondary.