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The Airdoctor 3500i Air Purifier delivers professional-grade air cleaning for homes up to 1260 square feet. This smart unit combines UltraHEPA technology with app connectivity for complete control.
What makes this purifier special? Its UltraHEPA filter captures 99.99% of particles down to 0.003 microns - that's 100 times smaller than standard HEPA requirements. The system includes VOC carbon filters and pre-filters for complete air treatment.
Smart features include real-time air quality monitoring, filter life alerts and six fan speeds. The adjustable jet fans operate 30% quieter than traditional purifiers whilst maintaining powerful performance. CARB certified for quality assurance.
The unit covers up to 1260 square feet with 2x per hour air changes, or 630 square feet with 4x per hour changes. For bedrooms and smaller spaces, the 4x per hour rate provides more intensive purification. Larger living areas benefit from the 2x per hour coverage, which still provides effective air cleaning for the entire space.
UltraHEPA technology captures particles down to 0.003 microns at 99.99% efficiency, compared to standard HEPA filters which capture 0.3 micron particles at 99.97% efficiency. This means the Airdoctor removes particles 100 times smaller than standard HEPA requirements, including ultrafine particles like viruses and bacteria that other purifiers miss.
The app provides real-time air quality monitoring, remote control of fan speeds and settings, filter life tracking and comprehensive indoor air quality alerts. You'll receive notifications about pollen levels, ozone concentrations, particle counts, temperature and humidity changes. The app also sends alerts when filters need replacement and allows you to monitor air quality trends over time.
Filters typically last 6-12 months depending on air quality and usage patterns. The system includes UltraHEPA, VOC carbon and pre-filters that are replaced as a set. The app monitors filter life and provides replacement notifications. Using original Airdoctor replacement filters ensures maintained performance and warranty compliance.
The unit operates at maximum 59 decibels and is 30% quieter than traditional air purifiers thanks to its adjustable jet fan technology. On lower speed settings, it runs virtually silently, making it suitable for bedrooms and study areas. The six fan speed options allow you to balance cleaning power with noise levels based on your preferences.
Yes, the auto mode uses built-in air quality sensors to automatically adjust fan speed based on detected particle levels. When cooking smoke or other pollutants are detected, the system increases fan speed to address the issue, then returns to normal operation once air quality improves. This ensures optimal air cleaning without manual intervention.
The pre-filter captures large particles like pet hair and dust. The UltraHEPA filter removes microscopic particles including pollen, dust mites, bacteria, viruses and smoke particles. The VOC carbon filter eliminates gases, odours, cooking smells and volatile organic compounds from cleaning products and furniture off-gassing.
The UltraHEPA filtration is highly effective for allergy and asthma sufferers as it removes common triggers like pollen, dust mites, pet dander and mould spores. The sealed system prevents allergens from bypassing the filters. Many users report reduced allergy symptoms and improved breathing after using the unit consistently in their homes.
| Model Number | AD3500i |
| ASIN | B0CPP1DSWD |
| UPC | 874617004863 |
| Dimensions (D x W x H) | 50.5 x 69 x 31.4 cm |
| Weight | 10.95 kg |
| Power Source | AC Mains |
| Control Method | Smartphone App |
| Filter Type | UltraHEPA |
| Floor Area Coverage (4x/hour) | 630 sq ft |
| Floor Area Coverage (2x/hour) | 1260 sq ft |
| Maximum Noise Level | 59 decibels |
| Fan Speeds | 6 Adjustable Levels |
| Particle Capture Size | 0.003 microns |
| Filtration Efficiency | 99.99% |
| Filter Life | 6-12 months |
| Included Filters | UltraHEPA, VOC, Pre-filter |
| Certification | CARB Certified |
| Auto Mode | Yes |
| Air Quality Sensor | Yes |
| Filter Change Alert | Yes |
| Real-time Monitoring | Yes |
| Remote Control | Smartphone App |
| Sealed System | Yes |
| Quiet Performance | 30% Quieter Technology |
| VOC Filter | Carbon/Gas Dual Action |
| Suitable Room Types | Bedroom, Living Room, Kitchen |