Tankless water heaters are ventilated in two ways.
Tankless water heater air intake inside.
Gas tankless water heaters don t have to use indoor air for combustion.
Concentric vents provide a couple of advantages.
Tankless water heaters don t always need two ventilation pipes even for direct vent units.
Indoor tankless water heaters draw in outside air.
Direct vent units pull in air from outside the home or building and have two vents one for intake and one for exhaust.
Air ducts required for combustion must be at least 3.
For rinnai condensing boilers.
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 water heaters can use two separate pipes for intake and exhaust but some manufacturers offer concentric venting a single pipe that contains an inner exhaust vent and an outer intake vent.
It is held together with 4 screws.
Direct vent and power vent.
This allows for significantly fewer wall or roof cuts less labor and longer vent lengths than ever possible with single unit tankless water heater venting.
In fact tankless water heaters save up to 16 square feet of space.
To enjoy wifi control which enables you to adjust your water temperature and monitor your system from anywhere in the world consider a model that s econet enabled.
What code would does apply in this case.
The manufacturer seems to be ok with either approach.
Tankless water heaters can be vented in two ways.
For use with sensei se tankless water heaters condensing and m series.
Our furnace boiler intakes indoor air as currently installed so logic tells me i could do the same with the tankless water too.
Power vent units use indoor air for combustion and simply vent the exhaust to the outside.
Tankless water heaters which are installed outside enable to provide free indoor area.
The air intake filter is located inside the tankless water heater.
This configuration allows tankless units to fit in smaller spaces.
Air intake filter for rinnai boiler.
One combustion air opening must be installed within 12 inches of the water heater s upper enclosure and another within 12 inches of the lower.
With rinnai common venting up to 8 tankless water heater units share the same vent system.
Tankless water heaters which are installed indoors attract air from the outside.
Power vent and direct vent.
Direct vent units pull in air from outside the house so they have two vents for intake and exhaust.
I have the option to let our new tankless water heater intake indoor air it will be installed in a semi finished basement or intake it from the outside.
2 on top and 2 on bottom.
