SimPure HP8 Large Room Air Purifier up to 800 ft² Air Clean Ture HEPA 2-Pack

  
Fan Speed 1/2/3, Sleep Mode. Composite H13 HEPA Filter x 1. Every 6 months or after 1,500 hours of use. What is CADR of an Air Purifier? CADR ratings show the effectiveness of how efficient the air purifier is at capturing fine particles from things like tobacco smoke and plant pollens from the room. How much noise does it produce? The working noise of SimPure HP8 is 44 dB maximum and as low as 23 dB in sleep mode. How do I know when I should replace the filter? It is recommended that you replace the Composed Filter every 6 months (depending on use) to maintain an optimal level of air purification. When it reaches the replacement cycle, the filter reset indicator lights up to remind you of a replacement.