Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Can it be used on it's side?
Document: Air-flow is through side vents and a top vent so you'll want to place it somewhere that won't obstruct the flow.The fan has multiple speed, with the slowest being very quiet.
i ordered because i have really bad allergies to dust, pollen etc. this sits on the side of my bed at night and i have the filtered air blowing at my face while i sleep. seems to have really helped my allergy's as i don't wake up dying with a runny nose and sneezing.on a side not this thing is pretty good a detecting un-clean air.
I've been running this non-stop for about a week now. It seems to be a nice, effective unit, although it is the first one I've ever used so I don't have a lot to compare it to.It was slightly larger than I anticipated, but that's a good thing. It comes with several replacement filters.
Assembly: The unit comes fully assembled, but it is necessary to open it up, remove a plastic bag (keeping the filter clean), and close the unit again. This process took maybe 5 minutes, most of which were spent reading the directions to make sure I was doing it right.Sound: I've used the unit in several rooms at varying degrees of power.
Plus I like how it looks (so does my wife) compared to other air purifiers on the market. The PlasmaWave light on top of the unit pulses and I found that to be a bit annoying at night. However I got used to it fast and now hardly notice it. I will probably purchase another one of these down the road assuming it holds well over the next year.
this filter is 1st class for its price range.it is very very quiet in low mode and it automatically switches to it once the lights go out.our baby does sleep with it in the room.it has an automatic sensor which worksit detects even farts (no joke)highly recommend
Works well. No problems.
When you turn the lights back on, the display brightens. Pretty cool.All in all, we did notice an obvious improvement in air "freshness" after implementing this device, and we like having our air HEPA filtered. We're very happy with it and would recommend it to friends.
When I first started it up there was a bit of a plastic smell, but that dissipated in a few hours, and now the air coming our of it smells clean. Overall, it's unobtrusive, and does clear the air of cooking odors and, I assume, whatever else is in the air.
When I cook fish, for example, the fan gets louder and eats up all the stinky fish smell. I've also noticed my allergies have been better and I don't wake up so congested. Some of the other reviews mention an annoying buzz sound, but I haven't noticed it. If you are looking for a high quality air cleaner at a really reasonable price, this is the right model for you.
Answer: No. The sides are where the intake vents are located.  This would cut the airflow in half and make the purifier not as effective.  It also would be really unstable as the sides are not square.