i have a us stove 6300 unit vents straight out the back of the furnace directly outside then up the outside wall with a 90 degree elbow and a termination cap. the cap is the sloped fron type i used simpson duravent for pellet stoves and furnaces. my question is this i have a deck directly above where my vent is i had no choice as this was the only location i could put the vent. the deck does not interfere with the venting but rather the fumes are turning my deck black. i know i can pressure wash it off but ist making a real mess. was wondering if anybody has same issue or has ran into this and what have you done about it? i was thinking of putting a tin roof on the underside of the deck to keep it from comming up through. not sure if im stuck with what i got or if there is a possible solution any input is appreciated thanks
