The go-to pick when you need serious coverage for open-plan pet homes. Handles large spaces up to 1,560 sq ft and adds smart app control the base Mighty lacks.
If you have a big living room where your pets roam freely, the 400S is worth the upgrade — it's the Mighty's bigger, smarter sibling and Reddit loves it almost as much.
“The one with the best reviews I've seen is Coway Airmega 400S. Avail on Amazon.”
