The buddy heater keeps it very warm with the windows closed. My point was with all the windows open it becomes ineffective. Hence asking about the infrared that would warm you even with the windows open.
I feel like my original post has been entirely misinterpreted. Ultimately it sounds like there’s no low intensity infrared heater, like the ones on outdoor patios, that would make sense. That’s perfectly fine, I was simply asking the question because last weekend I had pondered it while I was toasty warm in my plastic deer stand with the windows closed. For those of you who say being cold is just part of hunting, that’s fine. You can have all of the cold, I will not be trying to take that from you. I have the option of warmth, thus I choose it. My toes, nose and fingers all thank me.
For the guy who suggested a shooting stand to help direct the heat a bit, I think that’s an excellent idea. I had considered building a couple simple shelves in there anyway.
I’m looking forward to enjoying one more extended weekend in the aforementioned warm deer stand.