Heating: Hydronic heating system. Three 32-gallon expansion water tanks (manufactured by Amtrol, Extrol model no. SX-60V) and eleven gas-fired hot water boilers (manufactured by HydroTherm, model no. MR -1800B). Electric capacity: Pad-mounted transformer, with underground conductors. Two panels sized at 1,200-Amps, 480/277 volts, 3-phase, and 4-wire alternating current.