Best known for its Wi-Fi controllers that imbue dumb room air conditioners with smarts, Sensibo has leveraged its expertise to build the Sensibo Pure, a Wi-Fi-connected air purifier for small rooms. The Senisbo Pure can work in conjunction with Sensibo's other products to improve air quality, but it doesn't depend on the presence of one. The tradeoff for this air purifier's relatively small size--it measures 7.68 x 7.68 x 15.28 inches (WxDxH)--is that it can cover rooms only up to 173 square feet (e.g., a room with dimensions of about 13 x 13 feet with a typical 8-foot ceiling). Multiple Sensibo Pure's can be deployed around your home and controlled from its mobile app once they're connected to your Wi-Fi network (2.4GHz only). A feature Sensibo calls Pure Boost can increase that coverage to 294 square feet for a limited time (more on that in a bit).