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What is the difference between a standard water heater and a direct vent water heater?
Wiki User
∙ 13y ago
Generally, a direct vent must be next to an outside wall or be connected to a chimney that extends 2-4 feet above roof peak (all gases and fumes from the burner will vent naturally). A power vent is used when the unit is put inside the home in a closet or on an interior wall. It must have venting to an outside wall and must have a blower fan to remove gases from the water heater so they don't back up into the house.
Wiki User
∙ 17y ago
Wiki User
∙ 13y agoDirect vent takes incoming air and discharge though the same flue as it is sealed combustion.
A regular flue is strictly for the discharge of dangerous fumes.
See the NFPA 54 or national fuel gas code or the NBBI ,ASME section IV
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