Blueair Blue 511i Max Smart WiFi Air Purifier, HEPASilent Dual Filtration Up To 43m², Whisper Quiet, Air Cleaner for Pets, Allergies, Virus, Dust, Mould, Smoke

Seems ok, and phone app is useful. I've been using this for approx one month now and the phone app connected to this device is super useful to check on the current 'air quality' level as well as viewing how much of the filter is 'left' until it is recommended to be changed. My air quality is generally good or excellent on most days, and there is still (after one full month, 90% left) of my filter for use. So, it isn't working hard and you can probably get 10 months or 12 (if you push it) per year with each filter. Operationally, usage is very quiet, which is solid plus.

Works well-exactly as expected. It is not too noisy.An unexpected plus-during the hot spell, this air purifier kept the air cool and fresh .Would recommend

Great product.Had it around 2 months now and I'm shocked at the amount of dust this thing has filtered out the air.I bought this as I wake up with a blocked nose and a feeling like I've been tickled with a feather in my nose. Was dubious that this would make a difference but I was at my whits end so gave in, bought it and now wouldn't sleep without it on.Ease of use:Being able to store it behind my tv and be able to control it by the app is such a great thing. Easy to use, press the power button and it comes on, slide the fan speed and it changes quickly and an easy button press for night mode that you can barely hear

good air purifier but fan makes a lot of noise

I use this in my bedroom at night. I switch it on to cycle the air 30 minutes before I go to bed, and I can finally breathe. My sleep is better; my sinus congestion is gone. I wish I could strap it to me so I'd have all-day relief too.When I first got this HEPA filter the app said my bedroom was polluted or very polluted. Now at worst it jumps to moderate, but most days it's good before it clears to excellent.The fan on full is a little noisy, but I only use it on 3 to fully cycle all the air in the room. Once the cycle is complete (the app tells me) and air quality is back down to 0, I switch to the night mode and although it's only 3ft from my head, I cannot hear it.

Very pleased with the quietness of the 511i Max and with its comprehensive app functionality. I wanted a quiet air purifier (my previous Vax was too loud) and did plenty of research before buying. It is delightfully quiet! Hard to hear at all on night mode and on speed 1, audible on speed 2 but sounds like a pleasant breeze rather than the annoying hairdryer-like sound some fans make. Even speed 3, whilst much louder, is not terribly annoying. And the excellent app gives a fully adjustable slider to control the fan speed, not just three settings, so you can effectively set fan speed to 2¼ or 2½ to better control the noise. The app's schedule feature is also excellent, allowing full control over the times and days the purifier will automatically turn on and off, and the mode/speed it will use when it does. The purifier looks very smart and minimalist too, though changing the filter will be more awkward than some air purifiers due to the fabric cover. Overall, really pleased with it and would happily buy again.

I used to have a blueair 211, the square one which worked fairly well for about 4yrs until it started making a high pitched whine and the fan blades were clogged with dust with no way to get in there to clean it. So I bought this one. Very lightweight but also had an annoying high pitched sound from the start especially noticable on the first speed.I quickly noticed within days this is useless at keeping dust at bay. My surfaces were thick in a few days whereas my 211 had kept it down despite running on a low speed all the time and this one at speed 2. I suspect the thicker prefilter on this may be the suspect. My nose was still stuffy all the time unlike with the 211.Whenever I needed to reboot my router this purifier would not connect with the app meaning I had to delete it and reset it up again. There's no way to just reconnect in the app itself. At the 3 month mark it refused to connect with the app, it also started having power problems. Suddenly and repeatedly the fan speed would stop for a few seconds with a flashing white light then come back on again. Thankfully Amazon were fabulous and let me return for a refund. I will be purchasing a different brand and I doubt I'll be coming back to blueair anytime soon.

I bought this to see if it would help with issues with my eyes and ears. It has more than met any expectations I had. It is easy to set up, quiet on the auto mode and the night mode is so quiet you can hardly hear it - the first night I had it on I though we had left the window open since the air was so clear. I will probably end up buying another one so I don’t need to move it around the house.