I'm in Nebraska where it's getting pretty cold as well. I added an extra layer of insulation to my rack systems to lower my heating costs. I only keep the room around 70 degrees, racks are set at 89, hot spots vary from 86-92 degrees depending on location in the rack. Works well for me since I have multiple species and some of the BPs like it cooler for some reason.

I just bought the 4'X8'X0.5" boards of insulation with the foil on one side. Attached them to the outside of the racks with tape. Works like a charm.
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Lincoln, NE
0.1 Pastel, 1.0 Pastel het Pied, 0.1 Pied, 0.1 Cinn, 1.0 Black Pewter, 1.0 Woma (hidden gene?), 0.1 Yellowbelly
2.1 Normals, 1.0 Thayeri, 0.1 Thayeri X Alterna, 0.1 Whitesided P. catenifer sayi, 0.1 crazy cat, 1.0 husband

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