So if your using activated carbon filters for intake and exhaust, is there any chance a drug dog could smell a mini grow op just from walking down the street? What if the grow op is on the second floor of a house but toward the side walk? I read that in my state a police dog hit on a house for the smell of mary jane and they pulled surveillance until they caught the suspect. Just wondering if using a filtered exhaust would keep a drug dog at bay or if it would react. Of course I've taken into consideration the smell of smoke from burning but other than that is there a chance? thanks