I'm using this air purifier in my master bedroom, which is about the size of this machine's capacity (463 sq ft). It's silent, seems efficient, and with a long haired cat and a shorthaired corgi who sheds fur all year long, I'm glad to have it. I've not operated it long enough to determine how often filters need replacing.

My garage in the heat and humidity sometimes takes on a musty smell, and there seems to be a fair amount of dust in there at times, as I work a lot there. I thought this HEPA filtration device might improve the air quality, and it does! After two hours on medium fan, the air is fresher and more clear!The controls on the top are intuitive and easy to read and use. There is a minimalist instruction booklet. There is a colored ring on the top to indicate overall air quality. I am impressed with the performance of this device and will likely purchase another for the house.

When I got this up and running the display was showing red, meaning bad air quality, in my open plan living/kitchen area. It took just over an hour, running at the highest setting, to finally turn green! It's good to know it monitors the air quality while running which does give me some peace of mind.It also has a timer and sleep function. The sleep function operates at the lowest speed and turns the lights off. It's straightforward to use, has an easy to read instruction booklet and a light will come on when the filter needs changing. In between times you can turn the machine off and use a small vacuum attachment to clean the filter cabin and infrared dust sensor.

We have 2 dogs, one of whom sheds quite a bit. We also live in a dry and dusty area, so everything gets re-covered in dust as soon as you clean it. With this filter, it significantly cuts both the pet and dust issues. Our living room feels so fresh. Plus, it's QUIET! Wow - you forget it's there!

I've tried this in a few rooms in my house and have gotten a pretty similar reading in all of them so I decided to throw some variables in the mix. First time I vaporized (not smoked) some marijuana and blew it into the unit and it immediately reacted by ramping up the fan, the digital readout, and the color of the screen (which has set ranges so it can be seen across the room even if you aren't close enough to see the number). I couldn't believe how urgently it reacted but it came down nearly as quickly as it ramped up showing it scrubbed the air pretty quickly.The next test was to blow cigarette smoke at it and it was met with the same reaction but took slightly longer to clear which I would have expected. The third test was impromptu in the form of some cleaner that was giving me a headache after using it (I have a chemical sensitivity t some things). I put the unit right next to where it was applied and although the air quality number barely went up the odor was removed in a few minutes which I was very happy about.I've used this as basically as one could by simply turning it on auto and letting it do it's thing but you can turn up the fan speed and set timers on it as well. The light on top that corresponds to the set ranges of air quality also has dimming options and can also be turned off completely while the unit is still running.So far I'm happy with it.

Over the past two years, I've been really happy that air purifiers are a thing and more readily available. This one works great in my living room and you can immediately tell the difference after a few minutes. It is quiet and easy to take out of the box and use (I do recommend reading the instructions to familiarize yourself with the machine). The light controls are easy to understand and I'm happy with the quality of air!