Whats The Cheapest Form Of Heating What Is The Cheapest And Least Energy Consuming Device Or Method To Heat A Room Or Tent?

What is the cheapest and least energy consuming device or method to heat a room or tent? - whats the cheapest form of heating

One thing that I do not understand is that there gazillion ways in the heat, but the heat is still very expensive. Heat from solar energy, electricity, fire, oil, gas, geothermal heat, friction, motion, glass, rays are generated, bacteria, pressure and even uranium! And not even the many ways that we collect and transfer heat. Is it really so difficult to find a cheap form of heating on? I wanted to emphasize. Now the question is ...

I understand most of the consumer portable heaters 750 watts at a low temperature of 1500 watts for a further tightening. This is very expensive in energy. Is there a device that can do a room with 100 watts of electricity, heat? If an item is likely heat provided free of charge, why the next song Wish, "" thing?

Of the 21 Century, and we seem to pay more than that what is used for thousands of years of heat. The timber was then free. Oil, gas and electricity, it is not. Without oil and gas from the incineration of waste, the same result, where we are giving with electric heating? WAT 1000BEST TS, we have to heat a single room? Any other solution out there? As a portable stove? I think this question will be at the campsite. What is the best way to warm a tent, for example? Can a fire outside and has a fan in a heat stroke? Or how about a portable stove? If theres an electric heater can be powered by solar panels, so thats what I want to know. Thank you guys ===