In comparing the venting of exhaust gases from a high efficiency furnace boiler or water heater with the venting of exhaust gases from a conventional heating system it will be immediately obvious that the high efficiency equipment exhaust is produced at a low enough temperature that it is vented through comparably small diameter plastic piping rather than a cooled fire protected metal.
Venting a gas water heater through wall.
Atmospheric venting refers to a system in which exhaust from the water heater naturally rises out of the appliance s combustion chamber then travels up through a standard chimney style flue.
The question is does it have to vent through the roof.
And if he vents it through a side wall what would be the considerations.
Also you need to be aware of combustion air intake requirements for any type of heater.
The buyer wants to replace the electric water heater with gas.
A power vent water heater will cost about the same as a tankless heater and avoiding a through the roof vent can make the difference in a tankless installation being affordable or not.
This vent also allows for off gasses to be unleashed outside too.
The direct vent water boiler is another type of water heater venting that you should know about.
Direct vent water heaters.
Exhaust gases are vented outdoors through a separate vent duct or through a separate chamber of the same pipe this requires a double wall vent duct.
The air that is used for combustion will come from the water vent this vent will either through the roof or from the outside of the wall.