Hiya! I have set up my "chicken area" to be alongside our house in a fenced in side yard. However I forgot that our furnace vent empties out on that side. This is a bit of a problem, because it blows hot air downwards, and once my chickies are living outside, I could imagine them trying to spend a lot of time warning up under the vent. I'm wondering, how dangerous is this? What all toxins are coming out of that vent? It doesn't smell like gas. It's not killing the plants, in fact I used to have some annuals that lived many years under that vent due to the warmth. I imagine it would be bad to put their coop directly under the vent, as whatever fumes could accumulate in the coop- but maybe I'm wrong. Does anyone know? Thanks!