DEFECTIVE 2x Purchased the I-75 last year and upon arrival, when plugging it in, it was defective. I returned it and cancelled the subscription for the filter. I just received a filter for that device I no longer own. Had to call customer service to get a Return label. Never received it via email so called again. This took 30 mins on the phone .. ABSURD! Thought I'd give them another chance... I took advantage of the BOGO deal and purchased 2 devices... One of them is DEFECTIVE AGAIN! So whatever you purchase full price or discounted, I'm 100% getting a defective item. Who does quality control here? This device has no remote control, and the app sucks. Customer service agents are a hit or miss. I'll pass

No instructions installing expensive filters For $70 for replacement filters , it's a disgrace that there are no proper installation instructions.

Machine is leaking After working beautifully for a couple of years, it now is leaking all over the floor and carpet. Help!!!

Creates clean, sweet smelling fresh air. We love our new Alencorp air purifier. I am no longer suffering allergy symptoms from indoor particulates created from our wood stove , or by our sweet dog. The air is fresh & clean and we are all much healthier & happier having purchased our Alen and running it daily. Thank you!

Best purchase in a very long time! The air purifiers I purchased from Alen are amazing. I can finally breathe again at night. No more making funny noises with my throat or hearing my husband snore. I never would have believed the air purifiers would have made such a big difference in the quality of the air we breathe. We purchased a large unit Breathe Right for the family room and run it every time we open the woodstove to add wood and occasionally during the day. The small tower unit, we run while we sleep. I would recommend these purifiers to anyone who would like to breathe clean, fresh air.