Tankless Water Heater Exhaust

Power vent units use indoor air for combustion and simply vent the exhaust to the outside.

Tankless water heater exhaust.

Tankless water heaters can be vented in two ways. Tankless water heaters can be vented in two ways. See the use and care manual for important information regarding the venting installation and materials for your tankless water heater. 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. Direct vent units pull in air from the outside so they have two vents for intake and exhaust. Direct vent units pull in air from outside the house so they have two vents for intake and exhaust.

Condensing tankless water heaters lower the cost of installation. Tankless water heaters use fans to blow exhaust from the unit horizontally allowing vents to terminate on the side of a house. The exhaust vent can therefore be pvc or polypropylene and not metal a feature that lowers. If a tankless water heater is not vented properly a number of things can happen.

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. The exhaust is a gas condensate that is highly acidic and corrosive to the venting so they require the right material.