Rheem rtgh 6 4 gpm at 60 f rise 0 93 uef gas tankless water heater direct vent model.
Direct vent tankless hot water heater.
Ultra low nox emissions scaqmd rule 1146 2 compliant.
Direct vent tankless water heaters require no extra power the exhaust gas is drawn out vertically through separate vent duct.
One is for intake while the other for exhaust.
There are two types of venting available for this type of tankless water heater.
Tankless water heaters are vented in two ways.
But many manufacturers now adopt concentric vents only.
Noritz nrc71dvng indoor condensing direct vent tankless water heater 7 1 gpm natural gas 4 6 out of 5 stars 9 1 050 00 1 050 00 1 60 oz.
Power vent and direct vent.
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.
Direct vent this type of vent draws air in from the outside and then vents the exhaust out as well.
There are concentric and dual.
This configuration allows tankless units to fit in smaller spaces.
Thus the using costs and venting costs are quite low.
In fact tankless water heaters save up to 16 square feet of space.
Tankless water heaters are ventilated in two ways.
For most direct vent systems two pipes are used.