Flue 130mm Flexible (used for 20L Diaphragm and 16L Constant Temp)
The flue is there to direct the carbon dioxide to the outside of the building, if this does not happen the geyser is fitted with a sensor that will shut down the geyser within 4 minutes. This is a safety feature.
When installing the geyser on the outside the use of a flue will give it a better draft, thereby improving performance.
Cap/Cowl helps protect geyser from foreign objects landing in the geyser and birds nesting
