show me your set up!

[The Serpent Merchant]

But when you use racks, you have to have the whole room heated?
og do people here use 2 heatmats? i have a cold climate

well air temperature is still important, heat mats do not affect the air temperature in racks all that much so if the room is a good bit below 75 degrees most of the time you are going to have a hard time heating the air in the rack. As kitedemon said it can be done but it isn't easy.