I'm not educated on all the different electric heating systems on the market, but I've been in my Open Range for the last month and with the temps dropping below freezing my space heater can't keep up at night. If I ran the furnace even at night I'd go through 2 bottles every week or two. From all my reading my new 4100 I'll be picking up this Saturday has much better r- values. Even so they are still propane hogs. If there was a 12v system similar to the tank heaters that could be used as radiant floor heating it would be more even and efficient heating. And there would be space savings as well by not needing a furnace or ducting.
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