For the last few years, I've built a small but useful greenhouse under the back porch to keep potted plants over the winter. It was cramped and simple, but it did its job, and gave my gentleman somewhere covered to smoke in nasty weather.
Unfortunately, because it was small and just closed in with 2x4s, the smoke would largely come back in the house with him when he re-entered, and then slowly seep out all the sides... including the one where the air intake for the HVAC sits.
Unfortunately, because it was small and just closed in with 2x4s, the smoke would largely come back in the house with him when he re-entered, and then slowly seep out all the sides... including the one where the air intake for the HVAC sits.