Philips AC4221 Smart Air Purifier For Home|Real Time AQI Display|Covers Upto 700 Sqft|Removes 99.97% Of Virus,Allergen,Dust & Pm2.5|50% Quieter|Filter Life Upto 9000 Hrs|Ideal For Living Room, Grey

A very good and almost silent air purifier. It works well for a 18ft x 12ft bed room effectively. It's super silent especially during nights. Brings down pm2.5 from 250 to 50 in less than a minutes time. Been using it close to a month. A good product so far.

Have been using the product since the last 15 days. It works like a charm. Cleans the air perfectly well. During Diwali when the outside reading of PM 10 was above 1000 and PM 2.5 was around 700, the purifier took 15-20 minutes to turn the air quality of my closed bedroom (12x12 feet) from very dirty (red) to dirty (reddish violet). It took around 1.5 hours to turn to blue (safest level of the air sensor). However, 4/5 days post Diwali, when the pollution level had subsided, the air purifier cleaned the air (red to blue) within 15 minutes. The air quality sensor does a good job. The look and finish of the product is wonderful. Before using the product, do take the cover off the filters. But I have couple of problems with the device for which I have deducted 1 star: A) The night sense mode gets turned on as soon as you switch off the lights (even during daytime with curtains closed) and the auto mode cannot be used along with night sense. Thus, you have to either manually switch on the fan at a particular speed, which is counter intuitive or be ready for a switched off performance after the lights are switched off. B) The filters are not readily available. I even enquired at markets in Delhi and was informed that the set of filters would be available after a week as the company is unable to fulfill orders. Further, the set of filter costs about Rs. 4000. Even though I don't need one currently, the air purifier would have a recurring cost of Rs. 4000 every year.

Very good air purifier for Delhi NCR pollution. Performance is upto the mark as it can bring down room aqi from 350 to under 40 in matter of 10-15 minutes. The controls are very easy to use as they're on top of to air purifier.

I wanted to write review earlier but though of using it for some time and then write it. I have been using it for 3 weeks. We (Me and my family) are chronic to Cold, Cough & Sneezing, Fever etc living in what is said to be the most polluted part of Bangalore. Having a industrial area close to us with a factory which produces medical oxygen cylinders and in the process emits poisonous gases does not help. Since I have sinus I used to fell ill almost every month and it would take 3 weeks, yes 3 weeks to recover completely, only to feel ill again in 2 couple of weeks. My kid is ALWAYS, yes always unwell, having runny nose, cough and cold and sometimes fever. We tried every thing, allopathy, ayurvedic, homeopathy in various degrees but nothing helped. Our flat is west facing which means the sunlight only comes towards the evening. In the last few months, we have observed 2 things. First, when we were in our native place (which is devoid of any kind of pollution) for 2 months, none of us fell ill. Second, we will be find when we are outside or someone else home but soon start feeling ill when inside our home. Having run out of all the options, I decided to give Air purifier a try. And it has made such a big difference that I almost curse myself for not having bought this earlier. The day purifier was delivered, I was having cold. By next day my cold was almost gone and that persistent runny nose stopped. My kid used to wake up in night with blocked nose. That is stopped also. It has been 3 weeks and it had a BIG impact on me (sinus patient) and my kid. It's not that my kid's illness is completely gone but it has reduced significantly. Due to this, we never stop running the air purifier. I am contemplating buying another one. The pre-filter needed to be cleaned once every week. It has been cleaned 2 times already. I was shocked to see so much dust collected in just 1 week of usage. We are living in such polluted air! Coming to purifier itself. It's very easy to operate, does not make much noise. When you switch on it's red but after 15-30 minutes (depending on room size) it's turns blue. It's Very silent in night mode. It's best to initially run in turbo mode so that air is purified fast and then switch to Auto mode so that it keeps doing it's job silently. The only issue is that it has a tendency to go into night mode even when the lights are on but not that bright.It does not come out of night mode without manual intervention. Cleaning the pre-filter is easy and I would suggest to do it weekly (in case of moderate to heavy usage) irrespective of whether the unit is asking for it or not. The allergic mode is just a gimmick. There is nothing special happening in allergic mode just that it won't run in full speed in order to avoid micro particles to go through the HECA Filter. Though it is mentioned that HECA filter needs to be replaced every 2 years, I am expecting that it will be much sooner for me (due to area we live in) and hence Philips should reduce the price of it. Overall, an excellent product and a must for all dwellers in metro cities. ( Looking at all the dirt trapped in filters so soon, I am wondering whether living in metro cities is a good idea at all)

I am extremely disappointed with the Philips 4221 air purifier I received. Right after unboxing and switching it on, the unit started making an unusual motor noise. This is not what I expect from a premium Philips product. As per Amazon customercare , I immediately contacted Philips authorised service, and their technician inspected the purifier. The official job sheet clearly states that the motor needs replacement. This means I was sent a defective product right from day one. Instead of offering a replacement for a brand-new unit, Philips is asking me to get it repaired. Why should a customer accept repairs on a product that arrived defective the very first day? I buy air purifiers to improve air quality, not to deal with motor issues, noise, and unnecessary service visits on a newly purchased item. For the premium price Philips charges, this experience is completely unacceptable. I strongly request Amazon to treat this as a defective on arrival case and issue a replacement or full refund immediately.

Hello friends I am ordering a Phillips air purifier on Amazon, I received this package in good condition and 15 days ago I used this package after I shared my experience, 1. Firstly delivery condition was good. 2. Phillips air purifier was smart purifier. 3.very fast air purification It purifies areas upto 20m2 In less than 10 min. 4.In this purifier used pre filter for dust pet hair, 5.used nano protect HEPA FILTER for fine dust, smog, allergies etc... 6.also used activated carbon filter for odors, vocs, no2, others gases. 7.long lasting filter with smart change indicator. 8.track, monitor and control the air quality anywhere. Overall good quality product and Im really satisfied the product.

Loved it, trusted brand and excellent quality!