Heating a yurt

[Kgilmer]

I am building a 12’ Yurt for meditation and will use it year round. I live in the mountains and need to heat it in winter. Temps in winter can range anywhere from 0 degrees to 30 degrees. Because the space is so small I don’t need a building permit as long as I don’t install a

heating

system (e.g. mini split, wall heaters, etc). So I need something portable and also with the ability to set a schedule and timer to keep the temps low (45-50), and then automatically heat to 65-70 an hour or so before I use it. Does anyone know of a

heating

solution that will work under these circumstances?