Tankless Hot Water Heater Exhaust

Condensing tankless water heaters lower the cost of installation.

Tankless hot water heater exhaust.

Power vent and direct vent. A flow sensor in this pipe then signals the control panel to begin the heating process. The exhaust fan is activated then the gas valve is opened and the burner is ignited. Tankless water heaters can be vented in two ways.

Tankless water heaters use fans to blow exhaust from the unit horizontally allowing vents to terminate on the side of a house. The exhaust is a gas condensate that is highly acidic and corrosive to the venting so they require the right material. The exhaust vent can therefore be pvc or polypropylene and not metal a feature that lowers. Tankless water heaters can be vented in two ways.

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. Direct vent units pull in air from the outside so they have two vents for intake and exhaust. 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. 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.

Direct vent units pull in air from outside the house so they have two vents for intake and exhaust. If a tankless water heater is not vented properly a number of things can happen. Power vent units use indoor air for combustion and simply vent the exhaust to the outside.