Appreciating Backup Heating ideas for apartment dwellers & others

Greetings Permies.

On the road to sustainability, sometimes we surrender and appear to be moving backwards. However this is a forward move...I will be moving into an apartment soon from a home with wood stove.
And am wondering if any of you wonderful souls would know what are the possibilities for backup heat for apartments with electric heat.

Many apartment companies have rules against open flame heating like kerosene heaters and such, due to the highly combustible nature.

My dream would be a portable Rocket Mass Heater. Could any of you who have designed and built any of the portable Rocket Mass Heaters chime in with your experiences.

Any motorcycle riders who have experience with the battery powered heated clothing??

Please feel free to offer any experiences you have had with backup heating.

THANK YOU FOR ALL YOUR IDEAS AND INPUT!

Max

Check out  this thread - Paul has devoted a fair chunk of time, and a lot of pages, to experiments along those lines...

Thank you, Burra, for the quick reply, I've already read through four of the eight pages of that thread. Yet, Paul is doing the electricity reduction experiment.

I'm looking for ideas for heating without electric, both for ideas to lower the electric bill AND for utilizing during power outages.

BLessings,
Max

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I recently remembered a way to create a heating pad using coarse rock salt.

Heat the salt in a skillet or other container until as hot as you desire. You will be wrapping it in a pouch of some sort--we first used aluminum foil, then layers of towels. I made it very hot. Then adjusted how many layers of towels to keep from burning my body.

This was great to use for cramps. The salt would still be warm in the moring when heated before bedtime. 

(In an all electric apartment, not sure how I would heat in a power outage. camp stove or ?)