FEATURES FILTER OUT 99.97% POLLEN: Pre-Filter, True HEPA Filter, Activated Carbon Filter all in one that clears out airborne particles, including dust, pollen, bacteria, mold spores, pet danders, smokes, VOCs, etc. Ideal guards for people with allergies, stuffy noses, and low immunity. CADR RATED 152+ CFM: It can purify an area up to 355 sq. ft. You will notice the difference within 10 minutes. Most customers choose it for living rooms, bedrooms, offices, restaurants, hotels and also labs. SMART CONTROL: Turn on Airthereal's smart control to automatically measure air quality. The unit will select the correct air purification mode according to your environment. SLEEP MODE: Enable sleep mode to ensure that the machine runs quietly during nights. REPLACEABLE AIR FILTER: Replace your filter when PM2.5 lights up and keep flashing. We recommend replacing the filter every six months for optimal performance. Medical grade H13 HEPA replacement filter is available   High CADR Rating ADR rated at 152+ CFM, APH260 fits for large rooms of up to 355 sq. ft, effectively capturing almost all air pollutants, like mountain smoke, dust, pollen. Smart Auto Mode Equipped with PM2.5 air quality sensors, APH260 automatically measures the air and choose the best and cost-efficient modes. Visible Difference It cleans up polluted air efficiently and constantly. We recommend replacing the filter every 6-8 months for optimal use.   Filter Change Reminder  When the PM2.5 light turns RED and keeps flashing, it's a reminder to check and change the HEPA filter. Press and hold the FAN & TIMER buttons simultaneously for 3 sec to reset it. Anion Function Activate the Anion function to accelerate air purification. No replacement needed for this component. 0-12 Hour On/Off Timer Extra-long timer ranging from 0-12 hours enables better schedule for your life. It saves your time and money, as well as extending the lifespan of the machine. PM 2.5 Smart Sensor It shows the real-time air quality around you. Please clean the sensor through the holes constantly to make sure it does not get blocked.   APH260 Air Purifier APH230C Air Purifier AGH550 Air Purifier https://airthereal.com/collections/air-purifier/products/aph260 https://airthereal.com/collections/air-purifier/products/aph230c https://airthereal.com/collections/air-purifier/products/agh550 CADR ROOM COVERAGE SAFETY CERTIFIED AIR QUALITY DISPLAY SMART AUTO MODE 152 CFM@@ 355 ft²@@ CARB, ETL and FCC@@ ✓@@✓ 135 CFM@@ 315 ft²@@ CARB@@ --@@ -- 324 CFM@@ 750 ft²@@ CARB, AHAM and ETL @@ ✓@@✓