DBW 2020/300 Combustion Air Blower - 1319333AParts Number: 50900400A,1319333A Webasto DBW 2020 300 Combustion Air Blower 1319333A is a key component of the Webasto DBW 2020 and DBW 300 diesel heater systems. This blower is responsible for supplying the necessary combustion air to the heaters combustion chamber, ensuring the fuel ignites properly and efficiently. The air blower helps maintain optimal combustion conditions, which in turn supports consistent heat output and reduces emissions.