Smart Air, H12 HEPA Filter for DIY1.1 and Cannon Air Purifier |Not comptable for Other air purifiers| White

Used these to make a DIY Corsi-Rosenthal Box to help with allergies and pollution from fireworks during the holiday season. Packaging was good and the filters are well made. We saw the difference almost immediately when multiple members of the family stopped having allergy issues after leaving it on overnight.

It works as what it is intended for. But you have to install it in your fan

I bought this from Smart Airs own office in Lado Sarai, Delhi. Works as claimed. Depending on pollution levels in your area, room size, air leakages in closed room etc., this can last 1m to 3m. For me in Delhi in post Diwali it lasts for about 25-30days. Been using these for the past 3yrs. 1st time bought it from Amazon coz of COD option.

I used this filter in Agra. I combined it with a Bajaj Ultima PT01 fan. The filter got completely black in 3 days continuous use.I am not sure if the filters get dirty this fast or is it the pollution level.The air outflow was also less.As per me neither DIY nor the company made filters are good for air purification.

These are great filters. I just feel they are a bit expensive. There is so much smog in India that you have to change these a lot! It gets very expensive. But they are good!

Does what it is meant for, works great.

Very good product

I am using this filter in laminar air flow(DIY). GOOD performance.