Lenox offers the Dansk Dr. Weil Multi-Room Air Purifier for $199.95. Coupon code "SLED30" drops it to $139.97. With free shipping, that's the lowest total price we could find by $110. It features an air quality indictator light, smart sensors that adapt to changes in air quality, 4-stage ozone free filtration system, and replaceable HEPA filter.