Z-Vent Concentric Vent Kit w/ 3" Fresh Air Intake and 4" Exhaust
Mfr Part#: 2SVSHTC43S
4" Concentric Vent Kit is manufactured from Category III stainless steel and is a must-have for all direct vent, sealed combusion (intake air from outdoors) Takagi tankless water heater installations.
If the unit is vented through the same wall it is installed on (typically, right above it) and the installation requires that the fresh air supply for the tankless water heater to be from outdoors, this kit is a convenient, cost-effective and easy-to-install solution.
This concentric vent kit is designed for 5-10" thick walls.