Photo-Illustration: The Strategist If you're dealing with allergies related to dust, pollen, or pets, buying an air purifier is one simple way to get serious results. Especially when, as Nic Barnes, chief marketing officer for the air-monitor company Awair, told us, even "small changes like new furniture, air fresheners, cooking, or cleaning significantly impact the health of the air around you." This Coway Mighty Air Purifier, as its name would suggest, is compact yet powerful and looks more like a handsome piece of tech than a bulky appliance, so it will seamlessly blend in with the rest of your home. It can handle rooms up to 361 square feet, has a HEPA filter, and features an easy-to-read filter-replacement indicator so you know when it's time to chang...