5pcs Ionic Air Purifiers

I ordered 5 purifiers i have used 3 of them 2 in the living room/dining room and the other in the bedroom. Today is the 14 th day, i run these 24/7. the br is 120 sq ft. and the living/dining rooms are a combined only 280 sq. ft. They in my opinion are NOT 100% effective.. I would rate them 70%..

2 dogs and 2 cats in 750 sq ft. Has really helped pet odors. Very pleased.

My 1st order of 4 . 1went bad immediately and I threw it away .Then a few days later the 2nd one started making noise like the fan motor is bad.. as for my second order 1 replaced the one that I threw away. 4 or still in the box. I will plug them all in to see how many of them are bad.