Who knows the brand of air purifier of Metropark Hotel in Wan Chai, Hong Kong?

Have you got any pictures? Generally, hotels and large shopping malls use central fresh air systems instead of air purifiers. They are completely different. The fresh air system can input fresh air into the room for 24 hours and discharge dirty air to the outside, but the air purifier only circulates and filters the air in the indoor closed space, and there is no new air supply.