Direct Vent Tankless Hot Water Heater

Tankless water heaters are vented in two ways.

Direct vent tankless hot water heater.

One is for intake while the other for exhaust. Direct vent tankless water heaters require no extra power the exhaust gas is drawn out vertically through separate vent duct. There are two types of venting available for this type of tankless water heater. Power vent and direct vent.

Direct vent and power 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. In fact tankless water heaters save up to 16 square feet of space. But many manufacturers now adopt concentric vents only.

For most direct vent systems two pipes are used. Ultra low nox emissions scaqmd rule 1146 2 compliant. There are concentric and dual. Direct vent this type of vent draws air in from the outside and then vents the exhaust out as well.

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. Rheem rtgh 6 4 gpm at 60 f rise 0 93 uef gas tankless water heater direct vent model. Tankless water heaters are ventilated in two ways. Direct vent units pull in air from outside the home or building and have two vents one for intake and one for exhaust.