Designed for spaces of up to 320 square feet, the Smartmi Air Purifier P1 ($179.99) is a relatively affordable air filtration system that you can easily pick up and move from room to room. It detects the presence of indoor allergens such as pollen and dust mites, as well as fine inhalable particles, and removes them quickly using a HEPA filtration process. The P1 performed well in testing and can be controlled via Amazon Alexa, Apple HomeKit, and Google Assistant.
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