MW B-S 09. December 2020 Edition No. 2
A motorised flue fan assists the upward draught through the chimney, helping eliminate potential flue problems.
The F55 and F85 CV Models have the option of a Chimney flue fan. Whilst this is certainly not essential, Zero Ridge do recommend that you choose this model to reduce any potential problem with chimney draught. By not having a flue fan, you will need to ensure that you have enough flue height to draw the emissions from the chamber and expel safely. This is no different to any other similar device or stove. By installing a fan flue you eliminate any potential flue problems, installation becomes straightforward, and your heater will be more efficient.