The Eccotemp FVI12 18" vent extension is for the FVI12 model. It is a stainless steel 2.5" x 18" Category II vent extension.
Please remember customer assumes all liability when purchasing replacement parts.
Great for those thicker walls when using the FVI12
this unit fits in perfectly with my home.Domestic water is heated with wood during the cold months in MN, but I didn't like the waste of my regular propane water heater so I installed the on demand heater and really like it.I power my world with solar panels and a windmill, so this unit is perfect,and my fear that it wasn't large enough was proven wrong the first time I showered. Bill