I bought a kerosene convection heater, the round 23000 btu kind, about a month ago as a secondary back up heat source. These heaters cost 130-150$. I am very dissapointed in the price of kerosene. The clear K1 as recommended by all of the heaters costs more than 6$ per gallon in the 5 gallon pail from a big box store and the red dyed bulk #1kerosene is 4.50$ per gallon from a fuel depot. Even at 4.50 per gallon it costs just as much per btu as a plain electric space heater with the added disadvantages of the slight smell, fire risk, handling efforts, and refueling efforts. I shut mine off outside as recommended by the manual to prevent the strong odors from stinking up the house.
Just one cylinder style heater throws 23000 btus which is equivalent to about 7000 watts worth of electric heat. The radiant kerosene heaters only throw 10,000 btus. My big honkin huge woodstove only makes 68,000 btus at near overfire.
So, if you have good cheap kerosene, it is a nice heat that makes no sound and even makes a little light. It is an excellent backup source of heat for power outages and if you are not a wood burner.
Permitting, code, and insurance issues are non-existant with the portable space heater.
I would love to find a cheap source of kerosene.