Bosch is in the process of changing the color of all the Bosch Greentherm, Therm and Greenstar units to White from the old color of Silver. This will effect the Bosch Outdoor Vent Kit - BTOK.
The new Bosch Outdoor Vent Kit - BTOK will change to white also. Please see the new part number listed below.
BTOK - #7736502448, (Old part #7709003213)