Hi, I was thinking to get Air filter for my family.
So for the coway & cukkoo there is option for purchase/rental.

So which one is worthy? Or should I just look for other brands.
For service how often they need to replace the filter and how much does it cost if purchased.

Which model do you reckon

I heard blu air is really a class above the normal air purifiers, is it true? Or just good marketing?  Some people with sinus swears by blu air and not any other brand