hey i have one of these! they are pretty awesome. idk what the temp is here right now in VA but its too **** cold for October here!! i dont want to turn on the oil heat yet, so the eden pure is running. our house is 900 sqft, set up like a square ( no long hallwaything) and it is on 4 inside temp 67, all rooms warm. it is crazy windy out and our front door is letting in a draft, SO prolly could be lower if not so windy out. We used this in our old house that had no heat and had 2 in gaps around the doors, the elec bill was no more than $150/mo and it was on close to full blast there.... coarse the Whole house there NEVER warmed up.
i have no idea how this compares to OIL tho. a friend of ours last year was paying $400/mo for oil for her 2bdrm. And using Other normal space heaters in the old house had our elec bill at $300. So comparativly, i think its good.
i just know, I'm Warm. lol.