We have had it for 2 years. We bought it for our 30 sqm store (we are on an island), but we only used it for one season. In the second year, we didn't bother turning it on because it makes WAY TOO MUCH NOISE even at low speed. At high speed, it sounds like an airplane. The relief when you turn it off is 10 times greater than when we turn off the fan in the kitchen. It's not suitable for a retail store but for warehouses or garages. The airflow is strong, but it is difficult to adjust it to achieve the desired effect. That is, to blow in a way that creates a wall of air that keeps warmth and dust out and cold inside. I wouldn't recommend it, as I mentioned before, for a retail store or restaurant. There are others that make much less noise with better results.