Your mother-in-law never stops complaining about how cold she is. Or maybe you have to endure those stiff wind days when that particular north-facing room won’t warm up. Your cabin was never insulated like you planned—and the list goes on. The solution can be simple, inexpensive, and energy efficient, although there’s a fair likelihood your mother-in-law will still be complaining about something else. Here are three great examples of space heater solutions that work for your home or cabin.