NovaVENT Appliance Adapter + Damper, 5" Single Wall Stainless Steel
Useful in colder climates for preventing freezing air from flowing back into the heat exchanger, freezing it and damaging the heater
• 5" Diameter
Compatibility and cross reference:
This item is the same as Takagi, AO Smith, American Heating part number 100112598.
It is compatible with the following tankless water heaters, as shown in their manual:
Marey 16L, GA16LPDP, GA16LNGDP (NOT 16L ETL which uses 3" diameter pipe)
Alternate Item # 2ZVB05