What size RHP

I'm considering ordering a new Pro-Line cage by Constrictors NW the size is 36x24x14. My question is what size RHP would adequately heat this enclosure. Where do you guys buy your RHP's? Also any suggestion on other cages would be greatly appreciated. Thanks

I would get a RHP from Pro Products or Reptile Basics. Call Pro Products either way. They have an equation that they use to determine the size and wattage RHP your enclosure needs