Be careful about some claims. Let it be known that every resistive electric heater in the world converts a kilo-watt hour of electricity into 3413 BTU. You can’t do any better or worse with resistive electric heat. Period.
If you have access to nat. gas, it takes a lot of discipline to come out ahead by heating just one room at a time with electricity. Resistive electric heat costs about twice as much per delivered BTU as natural gas in most parts of the USA. One kilowatt hour of electricity supplies 3413 BTU. One hundred cubic feet of gas (almost exactly one therm on your gas bill) is 100,000 BTU. Look up your local prices and do the math. One therm costs about $1.05 right now in the upper Midwest. Divide that by 80% efficiency on a typical furnace = $1.31 per 100,000 BTU delivered. You need 29.3 kilowatt hours to deliver 100,000 BTU (at 100% efficiency). At 10 cents per kilowatt hour, that’s about $2.90 or you can simply figure at 10 cents per kilowatt hour, a 1500 watt heater will cost you about 15 cents per hour.
