bobhunts
WKR
Good info here!
You can get it pretty warm but it doesn't last long. It will warm you up and dry things out but it's not going to allow you to get by with a lighter sleeping bag. The fuel is generally small stuff you can break up and it burns up fast. To keep you warm you would have to feed it every 10 to 15 minutes all night. I light mine and then get undressed and into the bag while it keeps the tent warm. If I've collected enough wood then I might sit in front of it and feed it for a while and get toasty warm but I make sure I save enough wood to make a good fire in the morning. After it burns down in the evening I'll set it up ready to light in the morning. I wake up and poke an arm out and light it first thing in the morning along with my cooking stove. By the time the water boils the tent is warming up. I can unzip the bag and start the breakfast rehydrating , make coffee , and dress without a nasty cold shock. I'll feed the stove a little while I have my coffee and eat.
Medium.