No ventilation at all. When I see how the winds blow, I just want to cry. The foul airs can come across the road from the bungalow where the couple burn dirty stuff to warm their house. I can smell it when they have their burner on. We can't open windows on that side as the road out there is very busy and the exhaust fumes are enough to ruin our health. Then, the factory airs next door are blown into my garden and by some freak, they are blown into my lean to, ie. into my house. When I saw the winds blow and how the bonfire smoke drift towards my lean to, I nearly burst into tears.