Philips AC1711 - Purifies Rooms Up To 380 Sq ft (36 M²) | Removes 99.97% Of Pollen, Allergies, Dust And Smoke, Hepa Filter, Ultra-Quiet And Low Energy Consumption | CADR 300 m3/h | Ideal For Bedrooms

Yes it works good. My father has a lung problem where he needs to be in clean air which in delhi was impossible, so, we installed phillips air purifier and its working great for him. His coughing as reduced 90%.Design is compact. Noise level is okay and the air quality after using this is usually less than 20

Here is a try at a review of this product after using it for an year now.Use Case :-I am a NCR resident and the air pollution is as we know one of the worst possible if not the worst. I have it installed in the bedroom, about 300 sq ft so well within the advertised max room space. While using the purifier the room is kept closed to minimize pollution addition.Build Quality :-The purifier is sturdy in its built and aesthetically pleasing. It has a large front grill that acts as the air inlet, and an arched back that has a larger grill for filtered air outlet. The arc helps the air to be released vertically upwards and hence does not add to direct cooling for anyone sitting in front. This helps the filters use in winter which is the main season where it is required. The top of the filter has a dark panel with touch sensitive buttons and a decent sized circular LED screen. The 4 buttons are - Power, Night Mode, Fan Speed, and Child Lock.Setup :-The air purifier is shipped with its parts packed separately. Thus on unboxing the same has to be setup for use. The setup is pretty straightforward. The main filter units front can be released and the individual filters aligned in order on the central space. The installation order of the filter is as followsFirst -> HEPA Filter. (The same has indication on top to correct installation. You can also go with keeping the Phillips Branding on the top left Corner)Second -> Active Carbon Filter. (The same has indication on top to correct installation. You can also go with keeping the Phillips Branding on the top left Corner)Third -> Pre Filter. This one actually clips in place and is used to filter out the larger dust / impurities so that it does not clog the other main filters.Thus the filtering order is Pre Filter -> Carbon Filter -> HEPA filterWorking :-The air purifier can be set to different modes. One of them being the automatic mode that automates the purifier working thanks to the inbuilt air quality sensor. The pollution level sensed regulates the fan speed accordingly. 4 levels are programmed and are indicated on the small circular LED screen by means of circular rings of different colors - Blue (Min), Violet, Pink, Red (Max). Red level would put the fan in maximum speed and blue would turn off the filter automatically.If you are not a fan of the automatic mode, you can use the fan speed button to move through the option of different fan speed/modes. They areFan Speed 1 - Indicated by 1 on the screenFan Speed 2 - Indicated by 2 on the screenFan Speed 3 - Indicated by 3 on the ScreenAutomatic Mode - Indicated by A on the ScreenAllergen Mode - This can be only added on top of Automatic Mode. It essentially bumps up the speed a bit on all the different color levels. This is to suit the sensitive people as this improves the air filtration rate.Turbo Mode - Indicated by T on the Screen. This puts the fan in the maximum speed possibleThats pretty much the major functioning of the air purifier. Additionally the filter has an automatic/forced night mode. The purifier automatically detects the lighting in the room and once it senses low to no light it automatically goes into night mode. The same can be forced by pressing the night mode button the purifier. What this does is that if the filter is in automatic mode, the fan speed is reduced on all the levels so as to minimize the noise.Summary :-So as to summarize my review and add my view here, the filter works pretty well for the use case i have. On regular winter pollution days its able to keep the air quality in control, even when working in automatic mode its able to go down from Red levels to Blue. Switching on an off intermittently as per the air quality levels. On drastic pollution days it has a tough time managing the air quality in automatic mode and i have to force it in turbo mode to get the air quality in control. If not too much of an air change is happening in the room throughout the filter is able to get the air quality to a much acceptable levels.The air quality indicator is a great value add on to the product. Much that is missing in similar priced competitors.I am little disappointed in the night mode working as it compensates air quality over noise. I believe the purifiers task is to ensure that the air quality in room is as good as possible. By reducing the fan speed to reduce noise works ok on normal pollution days, but is totally useless in any thing even a little worse (when i dont want to use turbo mode just yet)Durability of the filters has been decent. I have used it all through the winters last year and intermittently the summer this year but am yet to get an indication to change the HEPA or the Carbon Filter. On yes that reminds me the Air purifier would automatically sense and indicate when a filter needs to be replaced by displaying an error code on the screen. It even does that for the pre-filter which does not have to be replaced but just cleaned/washed. That i have received 3-4 times this past year.Overall i still strongly recommend this product- Good performance with a decent price which has been slashed a good amount from when it launched.

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)

So far so good 👍🏼 No problems at all. Clears air perfectly.