Do the Odorhog™ filters freeze up in extreme cold?
Even 3″ vent pipes with no filters can occasionally clog up with frost if it is cold enough for long enough. This is called “hoarfrost” and you can read about it here. For cold climates (Northern US and Canada) where extended weather of sub-zero temps are likely, we recommend the black ABS models which will absorb a little more heat than the white PVC models.
