“I use one of those oil-filled heaters in my little cabin in the winter.”
We use 3-4 of those in the house except on really cold mornings when the electric furnace is used to warm up.
They are basically 100% efficient so no complaints. Just not over 100% like a heat pump.
9 cents/kWh.
Yeah, they’re very good, my complaint is that my electric bill
DOUBLES those months I use it, with no other consumption change(s).