I’m imagining that what I see in my neighbor’s exhaust is the subsequent condensation as their exhaust gas cools to where the dew point is met and visible moisture becomes apparent.
I can see a clear difference between running my own boiler at 25°F OAT (lots of “steam”) versus 40°F OAT (almost none) while I see my cross-street neighbor showing large plumes on both. I’m not sure if I mistyped above or I’m actually thinking about it wrong, but I don’t think my observations are incorrect.
Having that water condense outside the building (giving up heat to the neighborhood) is less efficient than having that water give up its heat into the incoming (return) water.
I can see a clear difference between running my own boiler at 25°F OAT (lots of “steam”) versus 40°F OAT (almost none) while I see my cross-street neighbor showing large plumes on both. I’m not sure if I mistyped above or I’m actually thinking about it wrong, but I don’t think my observations are incorrect.
Having that water condense outside the building (giving up heat to the neighborhood) is less efficient than having that water give up its heat into the incoming (return) water.