Where is the Hitachi 60 heating box?

Hitachi 60 warm air water tank is hung in the cab. Hitachi 60 warm air tank is lifted in the cab. The heater box is only a heating component in the hot air conditioning system. When the water in the engine passes through the hot air tank, the hot air tank is heated, and the fan works to blow air to the hot air tank. The wind is heated when it passes through the warm air trough, and the warm air comes out from the air outlet.