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Core 300S-P, 400S-P or 600S-P: compare the room fit
These three smart Core models share a cylindrical purifier layout, a 120 V household operating basis, a sensor-driven Auto Mode, VeSync app features and an included pre-installed original filter. Their meaningful differences are room capacity at the same air-change rate, local display, available fan speeds, dimensions and filter schedule. The better choice depends on the actual room and placement rather than which model has the largest number in a product headline.
At the same repeated-cleaning rate
| Model | Room area at 4.8 ACH | CADR | Published body size | On-unit PM2.5 value |
|---|---|---|---|---|
| Core 300S-P | 219 sq ft | 141 CFM | 8.7 × 8.7 × 14.2 in | No numeric local display documented |
| Core 400S-P | 358 sq ft | 231 CFM | 10.8 × 10.8 × 20.5 in | Yes |
| Core 600S-P | 606 sq ft | 391 CFM | 12.3 × 12.3 × 23.6 in | Yes |
Choose the smallest model that fits the real room
The 300S-P is the logical first comparison for a closed room within its 219-square-foot 4.8-ACH figure. It has the smallest body and the shortest listed height. It offers app-connected PM2.5 updates and a color ring, but no numeric PM2.5 screen on the purifier is documented in its manual. It also has three listed manual fan speeds rather than a turbo option. Its filter check interval is the shortest of these three, typically six to eight months under the linked manual.
The 400S-P covers a larger 358-square-foot room at the same stated air-change rate and adds a numeric PM2.5 display and turbo speed. It is a substantial step up in height and width from the 300S-P, so it needs a more open placement. Its manual recommends checking the pre-filter every few weeks and planning for a main-filter replacement around 12 months, with real life depending on the room's particle load.
The 600S-P has the highest CFM and a 606-square-foot 4.8-ACH rating. Choose it only if the extra capacity is useful in a room with workable circulation and clear space. It is the broadest and tallest body, its filter housing separates into two sections for service, and the product page and matching manual disagree about rated power. If that electrical figure is an essential limit, do not infer it from the neighboring models.
Keep one common frame of reference
Each product page also lists a much larger area at one air change per hour. Do not use that number as the equivalent of 4.8 ACH. Likewise, compare each machine at a speed you are willing to use; the manuals identify turbo as the loudest setting on the two larger models. All three manuals ask for 15 inches of clearance on all sides, so a cabinet can rule out a product even when its body fits.
For exact control and maintenance details, open the individual reviews above. Use the finder if a minimum 4.8-ACH area, display, turbo speed or body-width cap is essential, and review the exact current product/manual details before purchase.