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.

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. Tankless water heaters can vent through the roof or a side wall creating more flexibility and options for placement. 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. Tankless water heaters can be vented in two ways.

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. Gas tankless water heaters don t have to use indoor air for combustion. Traditional gas tank water heater require venting through the roof. 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 are ventilated in two ways. Power vent units use indoor air for combustion and simply vent the exhaust to the outside. Power vent and direct vent. The process of burning of the gas is called combustion and it creates heat exhaust gases including highly poisonous carbon monoxide and moisture.

Tankless water heaters use fans to blow exhaust from the unit horizontally allowing vents to terminate on the side of a house. It doesn t matter if the gas is natural gas or propane this fact remains the same. Direct vent tankless water heater power vent tankless water heater and also atmospheric venting types are three common types on the market. Tankless water heater venting must be done correctly to ensure safe and efficient operation of the unit.

The vent system must be installed by a qualified person. If you have a gas fueled tankless water heater that is installed inside the house it needs to be vented to the outside. 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. But if you have an outdoor unit then you don t need a vent as the exhaust is already outside.