Not sure about your question but I put a couple layers of small-bubble bubble wrap between the inner and outer shower skylight and that really works to reduce the heat build up. I know for sure this technique will not harm the skylight.
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2018 Ram 3500 Laramie Longhorn 4X4 Dually Cummins Aisin CC LB / B&W Companion hitch
50 Gallon Transfer Flow in bed tank w/ Trax 3
2018 Montana 3121RL
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