I have the Dimplex CS1205 and I love it. It hasn’t made our electric bill rise noticeably. We’ve had it a year and use it every day in the winter for about eight hours. We bought it to supplement our forced-air unit and it’s done the job. Our living room has nine-foot ceilings and is about 15×25.
There are three settings on it- fire only, low heat and high heat. I don’t use the high heat for long because the plug gets warm (not hot) but I’m a worry-wart. Low heat, I can leave it on for hours. When the fireplace only is on I can leave it on 24/7.
It’s cool to the touch on top, as the heat comes out of the bottom, so I don’t have to worry about my cats sitting on it.
I paid $99 for it and we’re looking at buying a second one for another room.