The Winix C545 is a 4-stage True HEPA air purifier designed for rooms up to 363 square feet, featuring advanced WiFi connectivity and PlasmaWave technology. The comprehensive filtration system includes a washable fine mesh pre-filter that captures large airborne particles, an activated carbon filter that reduces volatile organic compounds and household odors from cooking, pets, and smoke, and a True HEPA filter that captures up to 99.99% of airborne allergens including pollen, dust, smoke, pet dander, and other ultrafine particles as small as 0.003 microns.

Smart features include dual air quality sensors that automatically adjust fan speed in real-time, a visual LED air quality indicator that changes color based on current air quality, and WiFi connectivity allowing remote control through the Winix Smart App or voice commands via Amazon Alexa. The unit is AHAM Verifide for 363 square feet with a CADR rating of 243 for dust, 246 for pollen, and 232 for smoke. It operates at five fan speed levels with the lowest speed running nearly silent at 27dB.

Additional features include automatic sleep mode that activates when the room darkens for quiet, energy-efficient operation, a filter replacement indicator that illuminates when filters need changing, and PlasmaWave air cleaning technology. The unit comes with one year of filtration supplies including one True HEPA filter and four carbon filters. Dimensions are 13.7 inches wide by 8.4 inches deep by 20.5 inches high, weighing 11 pounds. The purifier is AHAM Verifide, UL Certified, CARB compliant, and backed by a 1-year manufacturer warranty.