Oh, I also wanted to add that I have two homemade incubators in the garage in case of a freak accident and my Hot Box goes out. They should keep my eggs warm until I can purchase a new one if something happens. Also, I have a plan in place in case of a major power outage in winter. I have several extra large rubbermaid bins and hundreds of snake bags and hand warmers to keep everybody toasty if I have to pack everybody up if the power goes out for more than a few hours. And yes the rubbermaid bins have holes in them to provide air. Though here in Texas it rarely gets that cold. This year has been a huge exception.