I have doubt about this matter. How reliable is air purifier/ionizer since it involve big amount of money from RM 400-2000? Lets say I have small room and when somebody sleep there, the room was warm, smelly and dusty, if I put Ionizer inside the room, the air flow will be treated? Also I read from the product said that 99.9% no dust inside the room. is it true? Someone has try thsi product can share their experience here.

Thanks.