I have my exhaust leading to my attic and i can definetly smell my crop outside my house when a nice breeze comes through. My setup is the typical setup with the filter on the end and my fan at the top pulling air. I bought the filter from htg and its only been in use for about a month.

Is there anything you have to do to prepare your filter before use?

Has anyone ever heard of a faulty filter from htg?

Im only flowering 2 plants at the time but thats going to change in about 2 weeks when ill have 8 going. Its possible too that the smell is seeping through the cracks from my grow room where the attic opening is to the attic. Any insight?