Cocadori:

I think you're SOL for backpack sized space heaters. I checked REI, Cabelas and Campmor. This is the best that I could find. It uses 16 oz. propane canisters. Not exactly what I would call backpack sized equipment.

[Linked Image]

http://www.campmor.com/outdoor/gear/Product___81337

I own a small cheap single-burner propane space heater made by Texsport. You can get them at Amazon.com for $25-$30.

[Linked Image]

http://www.amazon.com/s/?ie=UTF8&am...b&hvdev=c&ref=pd_sl_8zqrmss3qh_b

Isobutane would be the smallest and lightest way to go but I couldn't find any heaters that use Isobutane. You might consider a small butane lantern like this one.


[Linked Image]

http://www.rei.com/product/643063/snow-peak-giga-power-lantern

Or you could just use a candle lantern. Might take a long time to make a difference to the temp inside a tent though.

If all you're going to do is run it for a few minutes to heat up your tent before you get out of the sleeping bag, then why not just use a butane canister stove?

KC


Wind in my hair, Sun on my face, I gazed at the wide open spaces, And I was at home.