I see a lot of people live in colder areas than I do. I am planning out the design of my chicken coop and run. I need to make it as ventilated as possible because most of time, I have to deal with hot and humid weather. At what temperatures do most people close off the vents? At what temperature do you heat your coop? What I would really like to know is at what temperature do chickens start to have problems in a dry ventilated coop? At what temperatures has anyone here lost part of their flock to the cold? The record low ever on the side of Houston I live is +9F. The coldest it has been in the last five years was 23 I think. We only have around 8-10 days a year were it gets below freezing and maybe 2-3 days a year where it gets into the upper 20's. Would I ever need to heat the coop? Given I only introduce new chicks when it is warm, preferably spring. Sorry for all the questions. Still in the planning stage.