Tankless Hot Water Heater Exhaust

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

Tankless hot water heater exhaust.

A flow sensor in this pipe then signals the control panel to begin the heating process. Tankless water heaters use fans to blow exhaust from the unit horizontally allowing vents to terminate on the side of a house. All of them unpleasant and some quite dangerous. Tankless water heaters can be vented in two ways.

Direct vent units pull in air from outside the house so they have two vents for intake and exhaust. The exhaust is a gas condensate that is highly acidic and corrosive to the venting so they require the right material. 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. The exhaust fan is activated then the gas valve is opened and the burner is ignited.

Power vent units use indoor air for combustion and simply vent the exhaust to the outside. Condensing tankless water heaters lower the cost of installation. 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. Tankless water heaters can be vented in two ways.

Power vent units use indoor air for combustion and simply vent the exhaust to the outside. If a tankless water heater is not vented properly a number of things can happen. Power vent and direct vent.