Cheaper shipping than the full size unit. This little solar air heater is mounted on my deck next to the sliding patio doors. It gets the room nice and cozy and starts to heat up the rest of the house.It does a decent job for it's small size. This smaller unit is a plus with easy installation and cheaper shipping. The fan does make noise; but not too objectionable. Switch from high to the low speed fan when you are close to it and you find it too loud. There should be solar air heater on every house. After you buy it, the heat is free! Oh...it doesn't work when there is no direct sun shining on it.

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