[TPA Technology Exceeds HEPA Standards] The TPA washable filter of the Airdog X3 air purifier can filter 99.9% of particles down to 0.0146μm, while HEPA filters only handle particles above 0.3μm. Compared with the normal HEPA filter, the TPA filter is up to 20X more effective, achieving real air purification that's easier to breathe and free from allergens and asthmatic triggers. [ Zero Filter Replacement Costs]Throw away the recurring cost and waste of disposable HEPA filters. The Airdog X3 air purifiers features a revolutionary patented TPA filter that's washable and reusable for life.No more yearly filter replacements. One purchase protects your air and your wallet for years to come. [Fresh Air in Minutes] X3 Air Purifier can clean up to 942 ft² per hour and 471 ft²in 30 minutes (CADR: 120 CFM) ideal for bedrooms, living rooms, offices, and other small to medium-sized spaces. The Airdog X3 purifier captures and removes 99.9% of airborne pollutants as small as 0.0146 microns, effectively removing dust, pet dander, pollen, allergens, smoke, odors, total volatile organic compounds (TVOCs), formaldehyde, and more from your home. [Real-time AQI & Auto Modes] With the built-in air quality sensor, the Airdog X3 air purifier can read the real-time AQI，the sensor lights up green, orange, or red for changes in air quality along .The Auto Mode will automatically adjust fan speed based on air quality to ensure you breathe the cleanest air and prolong filter life. [Quieter Sleep Mode] The ionic air purifier supports 4 purification speeds and 2 modes (sleep mode & auto mode) to adapt to different needs. Under sleep mode, the X3 ionic air purifier works with only a 22dB noise level .Designed for total silence. Enable Sleep Mode so you could forget it's there and enjoy a peaceful night's sleep. The Airdog X3 is a high-performance air purifier for home engineered with patented TPA technology. It captures and destroys 99.9% of microparticles as small as 0.0146 µm—exceeding even hepa air purifiers.Featuring a washable and reusable filter, it delivers efficiency, sustainability, and quiet operation.Equipped with a real-time AQI sensor and Auto Mode, it instantly adapts its power to maintain clean air while keeping energy costs low.