Jon mackay
02-06-2010, 12:07 PM
Does anyone know the rule for the maximum horizontal length of a natural draft water heater vent?
Here are some pictures of a run that is a total of 16' from the water heater to the chimney. The pipe is a 4" that meets another 4" from a furnace into the 5" Y and then 8" for about 4' into the chimney.
I am thinking the water heater should be moved or (more likely) switched out to a high efficiency system and vent out the sill area...
Scorching above the water heater burn chamber and I believe the vent above the water heater should run a 12" minimum vertical before a 90 degree bend is allowed.
Here are some pictures of a run that is a total of 16' from the water heater to the chimney. The pipe is a 4" that meets another 4" from a furnace into the 5" Y and then 8" for about 4' into the chimney.
I am thinking the water heater should be moved or (more likely) switched out to a high efficiency system and vent out the sill area...
Scorching above the water heater burn chamber and I believe the vent above the water heater should run a 12" minimum vertical before a 90 degree bend is allowed.