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A child lock stops a toddler changing the settings, turning the unit off, or opening a filter door. It is a small feature that decides whether your nursery purifier keeps running the way you set it.
The short answer is at least three feet, and ideally more. Here is why distance matters for both noise and safety, and how to place a purifier in a nursery that is barely big enough for the crib itself.
Running a purifier overnight is safe, recommended, and cheap. The questions that matter are how loud it is at the crib, how much it costs, and how to set it so it does not disturb sleep.
Sleep mode is where purifier marketing lives, because it is where the decibel figure is smallest. Here is what the number actually measures, what sleep mode changes, and how to compare two units without being misled.
A purifier can help a baby sleep or keep them awake, and the difference is a handful of decibels. Here is the target to aim for, and the three levers that get you there.
A purifier that cleans the air but lights up the nursery is a problem you can usually solve in a minute. Here is how to turn the display off, dim it, or cover it without blocking the intake.
Non-toxic sounds like marketing, but it maps to three concrete things: no ozone, no harmful off-gassing, and a filter you can trust. Here is how to check each one before you buy.
Washable sounds like a way to stop buying filters, but the truth is more specific: the pre-filter is usually washable, the HEPA layer usually is not. Here is what that means for a nursery and for your wallet.
A purifier removes dust that is floating in the air. It does not remove dust that has settled on surfaces, and it cannot stop dust being produced. Here is the honest picture, and the routine that actually keeps a nursery dust-free.
Black Friday is the best time to buy a purifier, and the easiest time to buy the wrong one. Here is how to tell a real discount from a fake one, and why the filter cost matters more than the sticker price.