I ordered two of these heaters to heat an open semi-enclosed canopy. I ended up only being able to use one due to outlet limitations. One works well as long as the outside temperature is not too cold. This allowed us to sit comfortably for hours in 45-50 degree weather, but not as efficiently as the 30s were. It's very small but powerful for its size. You have to be in a direct path to get heat, just like other infrared heaters. I wish we could use both because it would make a huge difference in our space, but even with just one I'm pretty happy.
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