Brand new in box. Worcester Bosch Greenstar Fan Assembly 87161048150. Appliances from the RD Series and Si C1 series can utilize centrifugal blowers. To ensure that gas is burned safely, the centrifugal blower pumps fresh air into the boiler's combustion chamber. After burning, the blower also removes harmful gases. Compatible with  RD628 RSF, 28 Si II and 28 Si II LPG
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