Yup if you put a ring of Reflectix around it.......
https://www.bbq-brethren.com/forum/showthread.php?t=183939
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On a serious note, you could take 8 panels of plywood hinged, and sandwiched between some insulation
So 4 sides hinged, insulation inbetween the 8 panels.
Maybe some 2 inch spacers made out of a 2x4 so the insulation fits inbetween the sandwiched panels.
I don’t use insulation but I do use 4 hinged pieces of plywood. That helped. But what took it to another level was simply adding another piece as a lid. I don’t remember the ambient temps during a few cooks this past winter, but below freezing. The plywood box made the cook a breeze.
So to answer your question, I think it’s possible. You’ll use more fuel, but you should be able to cook in the cold.
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On a serious note, you could take 8 panels of plywood hinged, and sandwiched between some insulation
So 4 sides hinged, insulation inbetween the 8 panels.
Maybe some 2 inch spacers made out of a 2x4 so the insulation fits inbetween the sandwiched panels.
I'm about 30 miles north of you and use my WSM year round, finding lee spots around my home depending on the prevailing wind; but next fall I plan to go the welder's blanket route. Seems to be a sensible way to retain heat in the unit. I can probably pay for the welder's blanket in charcoal saved within 10 good smokes.
wind even in 50 degree weather sucks the heat out fast than a calm 20 degree day. Lump will burn hotter but you’ll go through more of it. What size also?
I've ran my 18 in -20° wind chill just fine. Chews up fuel some, still 8-10 hrs in a full ring. A wind screen helps alot. That refletix wind screen from home depot helps alot and is cheap and easy.