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.
Power vent tankless water heater.
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Direct vent units pull in air from outside the house so they have two vents for intake and exhaust.
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This configuration allows tankless units to fit in smaller spaces.
Tankless water heaters can be vented in two ways.
Power vent and direct vent.
Direct vent units pull in air from outside the home or building and have two vents one for intake and one for exhaust.
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.
Tankless water heater venting can be a quick and affordable job if you plan it right.
Indoor tankless water heaters draw in outside air.
Tankless water heaters are vented in two ways.
Power vent units use indoor air for combustion and simply vent the exhaust to the outside.
Tankless water heaters are ventilated in two ways.
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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.
Because of their unique construction power vent water heaters are virtually impossible to backdraft.
Gas tankless water heaters don t have to use indoor air for combustion.
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.
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.
Direct vent and power vent.
Tankless water heaters which are installed outside enable to provide free indoor area.
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However this doesn t have to be the case and usually isn t.