10 combustion air, 1 combustion air from outside the building, 2 combustion air from inside the building – AERCO BMK 2.0 LN for Mass. only User Manual

10 combustion air, 1 combustion air from outside the building, 2 combustion air from inside the building | 3 sealed combustion | AERCO BMK 2.0 LN for Mass. only User Manual | Page 21 / 114