Setup: We timed how long it took to set up the air purifier, from unboxing to its first use. We evaluated the ease of assembly based on the clarity of the instructions and the straightforwardness of the filter installation.Design: We evaluated the purifier’s build quality, size, and appearance to see how well it fits into a home environment. Practical design elements, such as cord length, display options, and feature convenience, were assessed to determine user-friendliness and aesthetic appeal.Noise Level: We used a decibel meter to measure noise levels at each fan setting, from quietest to loudest, to determine if the purifier could operate without disrupting daily activities or sleep.Features: We tested additional features, including app and smart home compatibility, filter life indicators, and air quality sensors. Features were rated based on their functionality, ease of use, and the extent to which they contributed to the overall user experience.Effectiveness: In the lab test, we utilized three conference rooms to verify manufacturers' CADR ratings for various room sizes. In controlled air quality chambers, we measured baseline levels of PM2.5 and volatile organic compounds (VOCs). We then evaluated improvements in air quality after operating each air purifier on low and high settings for 30 minutes. By introducing contaminants like incense smoke, dust, and pet hair, we assessed their effectiveness, recording reductions in PM2.5 and total VOCs ranging from 60% to 90%.Filter Inspection: After each test, we visually inspected each purifier’s filter to determine how effectively it captured allergens such as pet hair, dirt, and dust, providing insight into each model’s overall efficiency.Value: We assessed each air purifier’s price-value ratio based on all other ratings. We considered whether the product’s performance and features justified the price or if it might be better suited for purchase when discounted., The Best Air Purifiers for Allergies to Pollen, Pets & Smoke—After 3,000 Hours of Filtration. We tested over 70 air purifiers from brands like Dyson, Honeywell, Levoit, and Blueair to find the , A quiet air purifier for allergies. Levoit Core 400S Smart True HEPA Air Purifier . This Levoit air purifier stood out to our testers for its incredibly quiet operating at just 24 dB, which you .