Direct Vent Tankless Hot Water Heater
Thus the using costs and venting costs are quite low.
Direct vent tankless hot water heater. 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. Tankless water heaters are ventilated in two ways. Direct vent and power vent. This configuration allows tankless units to fit in smaller spaces.
Rheem rtgh 6 4 gpm at 60 f rise 0 93 uef gas tankless water heater direct vent model. Tankless water heaters are vented in two ways. Rtgh 95dvln 2 energystar condensing water heater. There are concentric and dual.
In fact tankless water heaters save up to 16 square feet of space. 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. Direct vent this type of vent draws air in from the outside and then vents the exhaust out as well. But many manufacturers now adopt concentric vents only.
One is for intake while the other for exhaust. Direct vent units pull in air from outside the home or building and have two vents one for intake and one for exhaust. Power vent and direct vent. Ultra low nox emissions scaqmd rule 1146 2 compliant.