It has a thermostat, chickens can sit right against it if they like. My Silkie does alot in winter. I usually turn it on at -10 for day time temps. Door is open. When it hits -20 as daytime high, they are locked up. I don't like frozen combs. As temp drops below -20, the coop will stay 10 degrees warmer. We don't get may -30 but the little flat panels do keep the cold edge off and keep wind out with door shut. Sometimes, they are shut in for a couple weeks at a time in the winter.That's an interesting heater. I'm going to check it out. I take it that it is fire proof? The picture shows the heater sitting on straw. Last year we wrapped the inside of the coop with thick plastic and used the big red heat lamp only when it got very cold and never left it on overnight (afraid of fire). We may try some hard insulation panels plus heat when needed. Does the heat radiate well from the flat panel as the heat lamp is very narrow but does take off the edge.