Tankless Gas Hot Water Heater Venting

All indoor tankless gas water heaters must be vented vertically or horizontally to the outdoors using factory approved venting material no other venting material is permitted.

Tankless gas hot water heater venting.

Tankless water heaters are ventilated in two ways. But if you have an outdoor unit then you don t need a vent as the exhaust is already outside. Power vent and direct vent. Power vent units use indoor air for combustion and simply vent the exhaust to the outside.

It doesn t matter if the gas is natural gas or propane this fact remains the same. Tankless water heaters can be vented in two ways. Tankless water heaters can vent through the roof or a side wall creating more flexibility and options for placement. Direct vent units attract outside air from the house or building while power vent units solely need an exhaust vent and should be installed in a larger area for receiving sufficient air amount for combustion.

Tankless water heaters use fans to blow exhaust from the unit horizontally allowing vents to terminate on the side of a house. Traditional gas tank water heater require venting through the roof. The reason is because like a standard water heater they create dangerous combustion gases when they fire. Direct vent units pull in air from outside the house so they have two vents for intake and exhaust.

If you have a gas fueled tankless water heater that is installed inside the house it needs to be vented to the outside. The gases contain carbon monoxide.