Direct vent and power vent.
Power vent tankless water heater.
This configuration allows tankless units to fit in smaller spaces.
In fact tankless water heaters save up to 16 square feet of space.
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Direct vent units pull in air from outside the home or building and have two vents one for intake and one for exhaust.
Tankless water heaters are vented in two ways.
Power vent units use indoor air for combustion and simply vent the exhaust to the outside.
As for which exactly one is the best way to vent tankless water heater it depends either on your applications or on your using places.
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.
Because of their unique construction power vent water heaters are virtually impossible to backdraft.
Power vent and direct vent.
Tankless water heaters are ventilated in two ways.
A direct vent system typically results in lower water heating costs because the exhaust gases are vented vertically with no extra power required as is the case with the power vent water heater.
Tankless water heaters which are installed outside enable to provide free indoor area.
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Power vent water heaters have quickly become the standard for newly constructed homes equipped with built in fans that push the exhaust gas out of the vent through a powered fan.
Direct vent units pull in air from outside the house so they have two vents for intake and exhaust.
When many consumers learn that a gas powered tankless water heaters must be vented they immediately imagine costly and invasive carpentry work.
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Direct vent water heater when using a direct vent water heater water is heated by the heat of fuel combustion.
Indoor tankless water heaters draw in outside air.
Tankless water heater venting can be a quick and affordable job if you plan it right.
When installed correctly both best direct energy tankless water heaters and best power vent tankless water heaters can offer you with best and most satisfying user experience.