I used this for about 3 months, only at night. ▼Model Number F-VXV55-W ▼Product Specifications Manufacturer: Panasonic Brand: PANASONIC Weight: Approximately 8kg Dimensions: Width 360 x Depth 238 x Height 562mm Country of Manufacture: China Warranty Period: 1 year Color: White Tank Capacity: Approximately 2.3L Filter Replacement Time: Approximately 10 years Operating Modes: Strong / Medium / Quiet Operating Noise: Strong 53dB, Medium 29dB, Quiet 18dB Humidification Range: Wooden: 8.5 tatami mats (14m2) / Prefabricated: 14 tatami mats (23m2) Humidification Volume: Strong: 500mL/h, Medium: 250mL/h, Quiet: 190mL/h Replacement Filters: Dust collection filter, Deodorizing filter, Humidifying filter Dust Collection Method: Mechanical (Electrostatic HEPA) Deodorization/Disinfection Method: Airborne: Nanoe X (4.8 trillion) / Unit: Clean HEPA filter (MAKSPEC), Anti-allergen: Clean HEPA filter Power Consumption: Strong: 53.0W, Medium: 8.0W, Quiet: 5.0W Estimated Purification Time: 8 tatami mats purification time: Approximately 12 minutes Applicable Floor Area: Air purification: 25 tatami mats (41m2) Power Cord Length: 1.8m