We have been using Dyson Air Purifier for almost three years and we have changed the filter two times. In Indonesia, the price of the filter gets higher as years went by. First time we changed the filter, it was only IDR 700K, last year it was IDR 1,5 millions. I dont know how much it is this year but I will check it soon as the indicator already told us that the filter was full.
I have been very happy to have Dyson air purifier in our bedroom. With its technology, I experienced allergy of pollutants only once or twice a year. It works like magic because before Dyson, I always got morning flu. Maybe because it automatically removes 99.95% of harmful ultrafine particles as small as PM0.1. The air feels fresh and with its technology we can know how much polluted is our room.
Another great point is Dyson air purifier can be used as fan! Yes a great fan, considering we love in a humid and tropical country. It also does not produce any weird sounds like some other air purifier. It akso has a very nice and elegant appearance. You can connect it through wifi and you can turn it on even though you are not in your room! How cool is that! I really really love Dyson products!
Sri