Quick question on animal plastics...

Is the T8 With Sliding Glass Doors lying flat on a surface able to be used with an ultratherm UTH? I'm considering buying one long UTH to use for two T8 enclosures, so that they're sharing it... both sitting on half of the UTH.


And do AP enclosures need to be combined with a heat lamp (like glass tanks), or are they fine with just UTH?

I'm basically worried about the thickness of the bottom of the T8 and how well it insulates heat from a UTH... it looks so thick to me in photos.