Greetings, anyone have a sealed combustion natural gas hot water
heater that can vent from the first floor vertically through a second
floor roof? One that does not require a powered blower to do so? One
with a tank, not a tankless one?
I see several sealed combustion units when doing a web search but
these seem to need to vent horizontally (and must vent a very short
distance immediately adjacent the unit).
Thanks for any input.