Length of plume management kit

[alan999]

As a general rule does anyone know how long the maximum extension on a plume management kit can be from the original horizontal terminal of a combi boiler.

Also I have been told that on a Viessmann plume management kit the outlet must be on the same wall and point in the same direction as the original terminal. Is this standard for all such kits?
Thanks

 

[Agile]

There is a limit to the total length of flue.

I think you are misinterpreting the Viess requirements.

I usually take them up and then discharge in +/- 45 degrees to either side as appropriate.

Tony

 

[alan999]

Thanks for that Tony. I'll get on to Viessmann and check their maximum extension length. I only want to go up about 3 meters.
I'm told the same direction bit is to make sure there is no pressure difference for the flue inlet an outlet which makes sense. I assume 45* either way wouldn't alter things much.