Side-by-side comparison based on expert reviews and community consensus.
Coway Airmega 400S
Best for Large RoomsLevoit Core 300S
Best Budget PickPrice
$280-$380
$70-$110
Summary
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.
The most affordable entry point recommended by Reddit's pet owner community. Compact enough for bedrooms and offices, with a smart app that punches above its price class.
Pros
- Covers large areas — handles big open-plan rooms where pets spend most time
- Smart app control for monitoring and scheduling
- Dual inlet design pulls air from two sides for faster filtration
- Washable pre-filter to capture pet hair before HEPA stage
- Frequently recommended alongside Coway and Winix for pet households on Reddit
- Smart app control at a budget-friendly price
- Compact size fits on nightstands or desks near where pets sleep
- True HEPA filter captures pet dander and fine allergens
Cons
- Significantly more expensive than the base Coway Mighty
- Replacement filters cost more than smaller models
- Bulkier footprint — harder to move between rooms
- Small coverage area — suited for single rooms only, not open plans
- Higher cost-per-square-foot than larger purifiers
- Filter replacements are relatively frequent given smaller filter size
Our take
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.
For renters or anyone who wants a solid purifier in a pet bedroom without spending over $100, the Core 300S is the honest budget recommendation the community keeps returning to.
Buy
