Winix 5520 vs Winix 5530

Very little. Winix 5530 is rated quieter at 23.5 dB against 27 dB, draws 45 W against 50 W and adds CARB certification. Winix 5520 has a light sensor that drops the unit into sleep mode when the room goes dark. Filtration, coverage, sensors, app and warranty are identical.

Yes. Both Winix 5520 and Winix 5530 are AHAM Verifide at a 253 CFM smoke CADR rated for 392 sq ft, using the same washable mesh pre-filter, activated carbon layer and True HEPA filter, so there is no practical difference in cleaning performance between them.

Winix 5530 by a small margin, since it is rated down to 23.5 dB and draws less power. Winix 5520 counters with its light sensor, which puts the unit into sleep mode automatically when the lights go out, so both are comfortable to run overnight.

Generally yes. Both models include the PlasmaWave ionization stage with its own control, and consumer testing bodies recommend leaving ionizers off since the mechanical True HEPA filtration works fully without it. Neither Winix 5520 nor Winix 5530 is certified ozone free with the stage enabled.

Both are controlled through the Winix Smart app with Amazon Alexa voice support. Google Home is not confirmed for either model, and neither is HomeKit certified nor listed in the Matter certified product database, so smart home integration is limited to Alexa routines.

Buy whichever is cheaper on the day, since they clean identically. If they cost the same, Winix 5530 is the marginally better machine thanks to its lower noise floor, lower power draw and CARB certification, while Winix 5520 makes sense if the automatic light-sensing sleep mode appeals.