hope this is the right section for this question.
I am changing out an electric water heater for 2 propane fired models.
1 for the domestic hot water usage, and a 2nd to run the radiant heat system I am putting in.
The location of the tanks does not allow a vent pipe to go straight up to the roof, right now I'm looking at running a vent pipe about 11feet horizontally to an exterior wall then up the side of the house to roof level.
Does this sound right?