Gas-fired furnaces provide more heat for your energy dollar than do any other type. Better than steam, coal, oil, propane, and yes, even better than heat pumps. But, most gas-fired furnaces are designed to heat large areas. In other words, if you're having a party and want to warm the whole house, a gas-fired central heating unit will give you the best bang for your buck. And even though portable electric heaters are probably the least-efficient and certainly the most-expensive type of heating device you can use, when you retire to that special room where you like to rest, they can be a money-saving friend. That's right, space heating with electricity still makes sense when heat is needed in one room, and the rest of the house is empty. Make sure your portable heater is ul-approved, and that it has a tipover warning devise. And don't forget warm clothing and a blanket. And that's the On The House tip for today.