Tankless Hot Water Heater Exhaust

How water is heated in a tankless water heater when you turn on your hot water tap it begins to pull water through the intake pipe.

Tankless hot water heater exhaust.

Power vent units use indoor air for combustion and simply vent the exhaust to the outside. The exhaust is a gas condensate that is highly acidic and corrosive to the venting so they require the right material. Direct vent units pull in air from the outside so they have two vents for intake and exhaust. Tankless water heaters with condensing technology are up to 95 more efficient than non condensing units and emit a comparatively cooler exhaust gas according to the propane education and research council.

All of them unpleasant and some quite dangerous. Power vent units use indoor air for combustion and simply vent the exhaust to the outside. A flow sensor in this pipe then signals the control panel to begin the heating process. Tankless water heaters are ventilated 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. Tankless water heaters can be vented in two ways. The exhaust fan is activated then the gas valve is opened and the burner is ignited. Direct vent units pull in air from outside the house so they have two vents for intake and exhaust.

Tankless water heaters use fans to blow exhaust from the unit horizontally allowing vents to terminate on the side of a house. Power vent and direct vent. The exhaust vent can therefore be pvc or polypropylene and not metal a feature that lowers.