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Coleman makes a smaller heater as part of a car emergency kit ($20 at the Coleman surplus store). I haven't used it yet but I hope it keeps a 2-man tent a little warmer.
20 hours on one cylinder, if you believe the box.
Mr. Heater makes a "tent safe" heater. We use them and they work fine. Not sure about the Carbon Monoxide.I tried to buy one the Xtremecats today but all the sporting goods places localy have warehoused all their backpacking gear for the winter.
I may just get the Sportcat. A couple of guys were using them like space heaters in camp on the Rubicon two weeks ago. 20 hours on one cylinder, if you believe the box.
Mr. Heater makes a "tent safe" heater. We use them and they work fine. Not sure about the Carbon Monoxide.
JB
IIRC propane combustion by products are Carbon Dioxide and water.
The later is more of a problem in a tent or closed space.
I lived in a cabin that had propane heat one time, it would literally rain inside if you didn't have enough ventilation.
Beg to differ: Carbon Monoxide IS a byproduct of propane combustion. The catalytic heaters are generally very efficient however they still emit some CM. That's why every propane fired heater I have seen/used/owned, catalytic or not, states to use in well ventilated or ventilated spaces.
You're thinking of hydrogen![]()
Just found these:
http://www.zodi.com/hotvents.html
Likely too big/cumbersome for backpacking, but you be the judge.
-LX Pilot
AT? Adventure Trailers?

We need the thermrest pads, we already have some good 0 degree bags.Spent 4 nights at 5300 feet with nightly temps hovering around 12 to 17 with a 0 bag and a 3 inch thermrest. It was almost too warm, no heater needed.
I have the coleman heater that works great, if I need to warm the tent up before sleeping.
Mr. Heater makes a "tent safe" heater. We use them and they work fine. Not sure about the Carbon Monoxide.
JB