I have a Delongi digital oil heater. I like it, but, to be honest you won't necessarliy save electricity. Some of those oil heaters are 1500 watts that means you will be pulling about 12.5 amps. That is very close to the max of an average 15 watt circuit in houses. I used one and it put me over baseline in the winter at my house on the electric bill(I was paying $250 a month in the winter). Long story short, I switched over to using a Heat Pump A/C unit I installed in my snake room. Yeah the unit costs more initially but it only pulls 4 amps and heats and cools my snake room a lot more efficiently. Good luck on your choice.