A device imposing but easily takes its place in a suitable room. A nice design and different bright colors depending on the air quality (even if it is not the goal) have their effect. This cleaner does its job perfectly, you feel the difference not only cooking odors absorbed very quickly and the smell of pièce.Il is silent in time (blue) but is a bit too noisy (red ). Easy to install, it deserves a 4-star to me. Cons: noise, space must be 20 cm on each side and behind, the price of the filter. Goodies: high performance, design. Highly recommend!