Gas Tankless Hot Water Heater Venting

All water heaters that burn natural gas or liquid propane lp gas require a venting system.

Gas tankless hot water heater venting.

Tankless water heaters are ventilated in two ways. The vent system must be installed by a qualified person. 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 that. Power vent units use indoor air for combustion and simply vent the exhaust to the outside.

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. Direct vent tankless water heater power vent tankless water heater and also atmospheric venting types are three common types on the market. Tankless water heaters are convenient and take up little space but the installation of gas fueled models is more complex than a traditional water heater installation. Gas fired water heaters like those illustrated here must be supplied with adequate combustion air and the heater s exhaust gases must be vented to outdoors.

Tankless water heaters can be vented in two ways. The process of burning of the gas is called combustion and it creates heat exhaust gases including highly poisonous carbon monoxide and moisture. Gas tankless water heaters don t have to use indoor air for combustion. If you have a gas fueled tankless water heater that is installed inside the house it needs to be vented to the outside.

Some tankless water heaters can vent directly through the wall which is helpful as it removes the need for anybody to be taking anything away from the roof although more traditional tankless water heaters designed many years ago will usually require rooftop venting. Traditional gas tank water heater require venting through the roof. Failure to properly vent a gas fueled water heater can result in severe injury or death from carbon monoxide poisoning. Venting serves as the most important factor in using tankless water heaters improper venting methods result in leakage of gas or even cause a fire.

But if you have an outdoor unit then you don t need a vent as the exhaust is already outside. It doesn t matter if the gas is natural gas or propane this fact remains the same. Power vent and direct vent. Tankless water heaters can vent through the roof or a side wall creating more flexibility and options for placement.