You want to use Foil Tape to stick the Heat Mats to the PVC enclosures. If using Heat Tape mine came with stickiness around it already. As far as the Screen... you will need a ambient temp so you still need a heat source like CHE or RHP. A heat mat only provides a Hot Spot. My home is 68 during winter and 68 during summer from central air. I use a RHP to keep a proper ambient and cool side temp. I also have the RHP on my Hot side which is 91 and that keeps my cool side 78-80.
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