Nuwave OxyPure ZERO Air Purifier with Washable Bio Guard Tech Filter We’ve tested numerous air purifiers, but the Nuwave OxyPure ZERO stands out for its efficiency and practicality. Our large living space, measuring up to 2,002 sq ft, benefited immensely from its powerful 0.1-micron filtration, capturing even the tiniest particles like smoke, dust, and pollen with 100% accuracy. The air quality monitor is a standout feature, offering real-time feedback that keeps us informed. We appreciate the washable and reusable Bio Guard Tech filter, which saves both money and the environment. Unlike disposable filters, ours can be rinsed and reused, making maintenance effortless. Though we compared it to rivals, the Nuwave’s combination of performance, cost-effectiveness, and convenience gives it a clear edge. For us, it’s a top contender in the washable filter category.