Ideal for budget-conscious buyers needing robust air purification for large bedrooms or living areas up to 1900 sq ft. If you frequently battle wildfire smoke, cigarette odors, or general household VOCs and dust, its high CADR smoke (1216) and effective multi-stage filtration are key. Prioritizing quiet operation for undisturbed sleep and smart sensor auto-adjustment, while keeping the investment under $500, makes Alen an excellent choice.

This is for homeowners with extensive open-concept spaces or multiple connected rooms, where maximum effective coverage (3120 sq ft/hr) and rapid air changes are paramount. If you prioritize filtering ultrafine particles down to 0.01 microns, robust VOC/odor reduction, and a guaranteed whisper-quiet operation at 22 dB, the Coway justifies its higher price. It's an investment for those seeking top-tier, energy-efficient whole-home air quality with advanced smart features.