Very bad design, I have ordered two units and still waiting for one more unit. However, this UNIT is very faulty design and there is no way of making unit to work if we lose the remote. Other hand, it takes its own time to start the heating element. I have literally waited for more than two hours and trying to find other possibilities to figure out how to make it on. And, its turning off its own and making entire my chicken coop very cold. Next day, again I have to go with all struggle to see how to turn it on again. Very worst design and would not recommend anyone to buy this.