Model differences

Core P350-P or Core 300-P: pet filter and lock or standard filter?

The Core P350-P and Core 300-P share a compact Levoit cylinder, direct buttons and a similar stated room scale, but they are not the same package. The P350-P is sold with a three-stage Pet Allergy Filter and adds a Pet Lock button. The 300-P is packaged with the standard Original Filter. Both are manual-control models; neither should be mistaken for the connected Core 300S-P just because a Levoit page contains shared VeSync marketing graphics.

Start with the room rating—not the larger one-change figure

Levoit lists the P350-P at 217 square feet at 4.8 air changes per hour and 1,042 square feet at one air change per hour. The Core 300-P page lists 222 square feet at 4.8 ACH and 1,066 at one ACH. For a household room where repeated circulation matters, compare the 4.8-ACH figures rather than treating the 1-ACH numbers as equivalent coverage. These are manufacturer ratings, not promises for an open plan, a tall ceiling or a speed you will not keep running.

Both bodies are listed at 8.7 inches wide by 8.7 deep by 14.2 high, but their manuals ask for at least 15 inches of clearance on all sides. Neither is a true drop-in shelf appliance. The modest difference between their published 4.8-ACH room figures is less important than checking actual room boundaries and leaving the air path open.

Filter package versus standard filter

The P350-P's included Pet Allergy Filter combines a pre-filter, main particle filter and activated carbon. Levoit describes the carbon as using ARC Formula for odors, and the non-woven outer surface is intended to catch larger debris such as hair, dust and lint. Its manual says to brush or vacuum that outer pre-filter every two to four weeks and to replace the filter about every six to eight months depending on use and condition. The Core 300-P arrives with its Original Filter; Levoit lists separate specialty replacement filters for that machine. If the pet-specific cartridge and odor-focused carbon are a priority out of the box, that favors the P350-P. If they are not, do not pay for a feature label you do not need; compare the actual offer and replacement-media cost instead.

Both filters need regular upkeep and do not remove settled hair from furniture or floors. Neither product's marketing is a personal test of allergen or odor reduction. A purifier is one part of a source-control and cleaning routine, not a replacement for it.

Pet Lock is not Pet Mode

The P350-P offers three fan speeds, Sleep Mode, a timer, a filter-check light, display off and Pet Lock. The lock prevents the current controls from being changed by a curious child or pet. It does not automatically choose a speed and is not a sensor or a pet-specific fan cycle. The Core 300-P also has direct three-speed controls but no documented pet lock in its manual. Neither model offers app control, Auto Mode, a particle sensor or a numeric PM2.5 reading on the unit.

If you want app control, scheduling or sensor-responsive operation, compare the Core 300S-P. That model changes the daily control routine, rather than merely changing the filter or adding a lock. It remains small-room class, so connected features do not solve a room-size mismatch.

Two spec conflicts deserve caution

The P350-P product page lists 45 watts and a 24–50 dB noise range, while its linked manual lists 56 watts and 24–56 dB. Neither source explains the difference; do not use the disputed values as a hard screening limit. The page says its timer is 2–8 hours, whereas the manual lists 2, 4, 8 and 12 hours. Treat exact timer duration as uncertain until the manufacturer clarifies the revision.

The Core 300-P has its own evidence wrinkle: the visible page and manual list 7.9 pounds, while the white SKU's structured page data says 7.5. Its published 4.8-ACH room figure and the manual's 5-/2-ACH table also use different rate bases. A comparison should preserve those distinctions instead of converting one set into the other.

Quick decision

• Choose the P350-P when the 217-square-foot 4.8-ACH listing fits, a direct-control machine is wanted, and the included pet-oriented cartridge plus setting lock are useful.
• Choose the Core 300-P when you prefer the standard Original Filter and do not need the P350-P's pet-focused package or Pet Lock.
• Compare the Core 300S-P when remote control or sensor-led automatic speed matters more than a fully manual setup.

For any of the three, check dimensions and clearance together, use the higher speed only when you can tolerate its noise, and plan for a real replacement-filter routine.