One Sanitify Clean Air System unit effectively covers up to 40m² (approximately 430 sq ft). For a standard living room or open-plan space under 40m², one unit is sufficient. For larger spaces, a home with multiple rooms, or a combined bedroom and living area, the 2-pack Combo is the most practical solution. The system is designed to operate continuously in a single room — moving it between rooms is possible but reduces the effectiveness of the probiotic microbiome establishment, which takes 1–2 weeks to reach optimal levels in a given space.

The True HEPA H13 filter should be replaced every 6–12 months depending on air quality in your home and usage hours. The app and device display will notify you when the filter is due. The probiotic Microbiome Balancer cartridge requires replacement every 60 days for optimal probiotic infusion activity — the Bacillus cultures gradually deplete as they are diffused into the air. The device monitors probiotic levels in real-time and alerts you when a refill is needed. Replacement filter sets and probiotic cartridges are available from the Sanitify shop.

Yes. The Bacillus probiotic strains used in the Microbiome Balancer are FDA GRAS (Generally Recognised as Safe) classified and are the same species used in probiotic food supplements and infant formula products. They are non-pathogenic and non-toxic. Airborne probiotic exposure from the diffusion system is at safe, low concentrations comparable to the natural probiotic spore levels found in healthy outdoor air. The unit is specifically suitable for nurseries and children’s bedrooms — the HEPA H13 filtration removes 99.97% of airborne allergens and pathogens while the probiotics support a healthy indoor microbiome.

Yes — it is specifically designed for bedroom use. At its standard operating mode, the unit runs at under 25 decibels — quieter than a whispered conversation and significantly quieter than a typical bedroom fan. The ultra-quiet mode (available via the app) reduces noise further. The LED display brightness adjusts automatically in dark environments and can be fully turned off at night via the app. The ultrasonic humidification produces no audible bubbling or gurgling. Most users run the unit 24/7 including overnight, which also provides the best probiotic microbiome establishment results.

A standard HEPA air purifier filters particles from the air that pass through it. This is effective at removing airborne allergens and particles, but it has no effect on surface contamination, does not address the sources of airborne particles (mold on surfaces, dust mite populations in upholstery), and provides no ongoing protection between air passes. The Sanitify Clean Air System does all of this — HEPA filtration of incoming air — plus two additional functions: ultrasonic humidification to maintain optimal 45–55% humidity (which reduces viral spread and respiratory irritation), and active probiotic infusion that deposits beneficial bacteria on all room surfaces, suppressing mold growth, reducing allergen production, and creating a 72-hour microbial shield throughout the room.