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The Nexva H790 transforms dry indoor air with its powerful 600mL/h mist output that covers spaces up to 1200ft². This large room humidifier features an impressive 15L water tank that delivers up to 72 hours of continuous operation on low settings.
Smart humidity control lets you set levels between 40% and 90%, whilst the built-in humidistat automatically maintains your preferred environment. The top-fill design makes refilling simple, even with the large capacity tank.
Four universal wheels provide easy mobility between rooms. The aromatherapy function includes a dedicated essential oil tray, whilst medical stone filtration and purple lamp purification ensure clean, healthy mist output for daily use.
On the lowest mist setting, the 15L tank provides up to 72 hours of continuous operation. On medium settings, expect around 25-30 hours of runtime, whilst the highest setting will run for approximately 15-20 hours. The actual runtime depends on your desired humidity level and room conditions, as the auto-adjustment feature varies output based on current humidity readings.
Distilled water is recommended to prevent mineral buildup and white dust formation. Tap water can be used but may leave mineral deposits on surfaces and reduce the effectiveness of the medical stone filter. The purple lamp purification helps with tap water quality, but distilled water ensures optimal performance and extends the filter life.
Clean the medical stone filter weekly by rinsing it under running water and gently scrubbing with a soft brush. Allow it to air dry completely before reinstalling. Replace the filter every 3-6 months depending on usage and water quality. Signs for replacement include reduced mist output, unusual odours, or visible deterioration of the stone material.
Yes, the unit operates at just 35dB, making it suitable for bedroom use. The sleep mode reduces noise further whilst maintaining effective humidity control. The auto shut-off feature provides safety when water runs low and the 12-hour timer allows scheduled operation. The gentle mist output won't disturb sleep whilst providing comfortable humidity levels.
The built-in humidistat continuously measures room humidity levels and compares them to your set target between 40% and 90%. When humidity drops below your setting, the unit automatically increases mist output. Once the desired level is reached, it reduces or stops misting to maintain balance. This prevents over-humidification and saves energy.
The package includes the main unit, 11-inch extension tube, four mist nozzles, remote control and user manual. Setup takes just minutes - attach the extension tube, connect the nozzles, add water and plug in. The top-fill design means no complex tank removal and the clear instructions make initial setup straightforward for anyone.
The essential oil tray holds 3-5 drops of oil which disperses naturally with the mist throughout your room. Whilst not as concentrated as dedicated nebulising diffusers, it provides gentle, consistent fragrance distribution over large areas. The benefit is combining humidity control with aromatherapy in one unit, making it ideal for people who want both functions without multiple devices.
Weekly cleaning involves emptying and refilling the tank, wiping down surfaces and rinsing the medical stone filter. Monthly deep cleaning requires descaling with white vinegar solution and cleaning the mist nozzles. The purple lamp purification system is self-maintaining but should be checked for proper operation. Regular maintenance prevents mineral buildup and ensures optimal performance.
| Brand | Nexva |
| Model | H790 |
| Tank Capacity | 15 litres / 4 gallons |
| Mist Output | 600 mL/h |
| Coverage Area | 1200 square feet |
| Runtime | Up to 72 hours (low setting) |
| Mist Levels | 3 levels |
| Humidity Range | 40% to 90% |
| Operation Type | Ultrasonic |
| Noise Level | 35 dB |
| Power Consumption | 50 watts |
| Power Source | Corded electric |
| Control Method | Remote control |
| Fill Type | Top-fill design |
| Timer | 12-hour timer |
| Auto Shut-off | Yes, when water low |
| Humidistat | Built-in automatic |
| Filter Type | Natural medical stone |
| Water Purification | Purple lamp system |
| Aromatherapy | Essential oil tray included |
| Mobility | 4 universal 360° wheels |
| Carrying Handle | Yes |
| Dimensions (D×W×H) | 22 × 22 × 62.5 cm |
| Weight | 3.2 kg |
| Shape | Rectangular |
| Colour | White |
| Material | ABS plastic |
| Extension Tube | 11-inch included |
| Mist Nozzles | 4 included |
| Sleep Mode | Yes |
| ASIN | B0GBTH6DWN |
| UPC | 735942092997 |
