Core 600S

Neither the Winix C909 nor the Levoit Core 600S-P would be enough. Per the AHAM 2/3 rule, a 2,400 sq. ft. home with 8 ft. ceilings would need minimum Clean Air Delivery Rates (CADRs) of 1,600 CFM. Since you have cats and a dog, even higher CADRs would be a good idea. There's no single consumer-grade

The room size HouseFresh used for testing the Levoit Core 600S-P is 728 cubic feet. With an 8 ft. ceiling, this only 91 square feet. 400 sq. ft. is going to take much longer to clean (if it ever catches up) on low airflow speeds.

So for a 300 sq. ft. room (with 8 ft. high ceiling), the AHAM 2/3 rule stipulates you need a minimum of 200 CFM CADRs. This assumes you don't have allergies/sensitivities, high pollution levels, or wildfire smoke events. No worries - just wanted to be sure you knew about airflow speeds and CADRs. Fr