Purchased in 2022 for plant ventilation. The wind power wasn't sufficient, so I bought a large industrial fan, and this one has been sitting in the closet. I added a PM2.5 filter to the air intake and filter, so I don't think the inside is very dirty. There are some minor scratches on the exterior and remote control. Also, I don't have the energy to clean it thoroughly, so I will send it after only a simple cleaning. I think it's better that way, so you can see how it's been used and feel more assured. I'm selling it at a low price, so I hope to hear from those who understand the condition.