Here's a couple of shots from our last weekend up in WV. Was around 5-10 degrees outside with the windchill factor. I also had our smaller one hanging in the RTT and only turned it on if I had to. I put a reflective emergency blanket, not the cheap Mylar one, between the support poles and the roof of the tent to help keep the heat from escaping through the fabric, protect the fabric & reflect the heat back down to us. Worked great!!
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