Standard equipment: German power motors, intelligent control, built-in air quality monitoring, high efficiency particulate air filter level, electrostatic precipitator, auto-defrost mode, filter replacement reminder, PM2.5 measurement shows optional configuration: CO2 monitor digital, negative ion generators. Intelligent whole House air purification system is a host, it has low resistance, high efficiency electric-bag dust removing technology of 150-450 four level air flow options.