Is there anybody using an oil filled electric heater like these at http://www.lakewoodeng.com/html/list_oilfilled.html to suplement the furnace in your house? I notice on the box that they recommend a distance of 3 feet to any combustable surfaces. Does that mean that they need to be on a heat resistant pad or can they be used on a wood or carpeted floor? I tried the contact link on their websight to ask this question but recieved an error message. I am looking for ways to cut my natural gas bill this year and I am looking for an energy efficent alternative. Any comments pro or con will be appreciated. I have used kerosene heaters in the past but found them to be dirty and difficult to regulate the temperature in the room they are in. I think they would also be unsuitable around small children.