8 square meters house for massage parlor. What is the exhaust for moxibustion cigarettes?

if you want to smoke, you need three exhaust fans with a diameter of 3CM to smoke, because your area is a little large, and if you use a thin exhaust fan or an exhaust fan, the smoke exhaust effect is not very ideal. In fact, you have massage and moxibustion now, so it's not reasonable to choose the smoke exhaust method. Those guests who don't have moxibustion will find it a little unacceptable to see so many cigarettes floating in the room after entering. You can go to Taobao to learn about an moxa box cigarette filter, which can effectively filter the smoke emitted from moxibustion box, so it's convenient to open the window to smoke!