A kick in the nuts due to new law....

[68TriShield]

This is the best solution I have found so far.Nothing will help with the smoke nazis though
After trying a Kerosene Heater and salamander type. I found this to be fast heating and it runs up to two weeks on a tank.
That's with going out most every evening for a two or three hours.
Normally I only use one side.

Make sure you have good ventilation!