This morning

On the roof of the boilerroom of unit EC 3.
A view at four out of five chimneys.
Vapour is coming out of the chimney of unit EC 6 which has stopped for small maintenance.
That's why you see vapour on just this one; unit is stopped so no hot fluegas is coming out.
The dearation of the drainsystem is going to the chimney; so when we drain the boiler you see vapour coming out.
This cannot be seen when the unit is running, this is done for cosmetic reasons... Years ago the technical director wanted no vapour on the roof when units where running, so they constructed it that way.

Nice weather today; plenty sunshine!
Hope it will be still nice when my visitor Ron arrives....