Prime Day deal: Our favorite smart air purifier is $37 off right now

Prime Day 2025 has brought a ton of deals to the internet, and one of the best at the moment is on an Engadget-approved air purifier. The Levoit Core 400S air purifier is on sale for $183, which is $37 off its usual price and not too far off of the lowest price we've seen. It's part of a larger sale on all kinds of Levoit devices including other air purifiers, cordless vacuums and more.

The Levoit Core 400S is our current pick for the best air purifier overall. Sure, it might not have the prettiest design of all the options we have tested and the companion app might have a little too much going on. But the Core 400S does its job and does it well.

This smart air purifier is slated to clean the atmosphere in spaces of up to 1,733 square feet ...