| key specs | 
| Type | Room | Room | 
| Filter Type | HEPA | Pre-Filter, HEPA, Activated Carbon, Photo Catalyst Filter, Ionizer, UV Filter | 
| Coverage Area | 861 sq ft | 495.14 sq ft | 
| Air Flow Level | 310 CMH | 365 Cu.m/hr | 
| Power Consumption | 45 W | 58 W | 
| Noise Level | 32 dB | 45 dB | 
| general | 
| Brand | Philips | Atlanta Healthcare | 
| Model | Series 3000 AC3821/20 Room Air Purifier | Gama 501 Room Air Purifier | 
| Model Name | Series 3000 AC3821/20 | Gama 501 | 
| Type | Room | Room | 
| Filter Type | HEPA | Pre-Filter, HEPA, Activated Carbon, Photo Catalyst Filter, Ionizer, UV Filter | 
| Dimensions (mm) | 80.00 x 49.00 x 0.00 | 610.00 x 345.00 x 0.00 | 
| Depth | 39 cm | 215 | 
| Weight | 13.9 kg | 7.50 kg | 
| Shade | White | White | 
| Material | Plastic | Plastic | 
| Coverage Area | 861 sq ft | 495.14 sq ft | 
| Water Tank Capacity | 3.5 L | - | 
| Control Type | Touch Sensitive Buttons | Touch | 
| Suitable For | House | Office, Home, Day Care Centers, Pediatric Care Units, Homes with Infants & Patients | 
| Technology Used | Vitashield IPS Filteration Technology | Advanced 6-stage filter | 
| performance features | 
| Air Flow Level | 310 CMH | 365 Cu.m/hr | 
| Number of Speed Setting | 5 | 3 | 
| Ionizer | No | Yes | 
| UV Lamp | No | Yes | 
| Clean Air Delivery Rate | 310 CMH | 365 CMH | 
| Humidifier | Yes | No | 
| 3D Circulation Air Flow | - | Yes | 
| Other Performance Features | - | 97.5% air sterilization with virus activation restraint and odor control | 
| convenience features | 
| Indicators | PM 2.5 Indicator, Filter Replacement, 4 Color AQI Ring, Humidity Indicator | Filter Replacement Indicator | 
| Automatic Shut Off | Yes | Yes | 
| Portable | Yes | Yes | 
| Display Type | Digital | LED | 
| Silent Mode | Yes | Yes | 
| Child Lock | Yes | Yes | 
| Timer | Yes | Yes | 
| Other Convenience Features | - | Safety lock, High grade 0.3 Micron HEPA filter to remove suspended dust | 
| power features | 
| Power Consumption | 45 W | 58 W | 
| Power Requirement | - | 220 V: 5 Amps : 50 Hz : 58 Watt | 
| Other Power Features | - | Power Button, Power Saving Mode | 
| additional features | 
| Noise Level | 32 dB | 45 dB | 
| Operating Temperature | - | 0-50 degree C | 
| Retractable Cord | - | No | 
| Adjustable Fan | - | Yes | 
| Certification | - | CE Certification | 
| Other Features | - | Generates 50 mg ozone per hour to
remove Organic odor and sterilize air. | 
| warranty | 
| Warranty Summary | 2 Years Warranty | 1 year offsite warranty | 
| Covered in Warranty | Manufacturing Defects | Warranty of the product is limited to manufacturing defects only. | 
| Not Covered in Warranty | Physical Damage | Warranty does not cover any external accessories (such as cable, carrying bag), damage caused to the product due to improper installation by customer, and filters. | 
| Warranty Service Type | - | Contact customer care at mankastu@vsnl.net. |