DHN20 - Air purifier Welltec - Free user manual and instructions
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| Type of product | Air purifier for home use |
| Brand | Welltec |
| Model | DHN20 |
| Recommended room area | Up to 30 m² (323 sq ft) |
| Clean Air Delivery Rate (CADR) | 200 m³/h for smoke, dust and pollen |
| Filtration system | Pre-filter, True HEPA H13, activated carbon filter |
| Fan speed settings | 3 manual speeds plus auto mode |
| Noise level | 25 – 50 dB depending on fan speed |
| Power supply | AC 220–240 V, 50 Hz |
| Power consumption | 30 W maximum |
| Dimensions (W x D x H) | 260 x 260 x 520 mm (10.2 x 10.2 x 20.5 inches) |
| Weight | 4.5 kg (9.9 lb) |
| Air quality sensor | Built-in particle sensor with real-time indicator |
| Timer | Programmable from 1 to 8 hours |
| Filter replacement indicator | Visual indicator alerts when filters need changing |
| Maintenance and cleaning | Vacuum pre-filter every 2 weeks; replace HEPA and carbon filters every 6 months |
| Safety features | Child lock, tip-over protection, thermal fuse and auto shut-off |
| Spare parts and repairability | Filters, fan motor and control board are individually replaceable; spare parts available |
| Certifications | CE, RoHS, ERP compliant |
| Included accessories | User manual, remote control, power cord |
Frequently Asked Questions - DHN20 Welltec
How often should I replace the HEPA filter on my Welltec DHN20?
Under normal use, the HEPA filter should be replaced every 6 months. The filter replacement indicator on the control panel will light up when it's time to replace it. If you use the air purifier in a dusty environment or near pets, check the filter monthly and replace more often.
Can I wash the pre-filter of the DHN20?
Yes, the pre-filter is washable. Vacuum it or hand-wash with water every 2 weeks. Make sure it is completely dry before reinstalling. The HEPA and activated carbon filters are not washable and must be replaced.
Why is my air purifier making a loud noise?
A louder-than-usual noise often means the filters are clogged or the fan blades are dirty. Check the pre-filter and vacuum it, and make sure nothing is blocking the air inlet or outlet. If the noise persists after cleaning, contact customer service for repairability options.
Does the DHN20 have auto mode?
Yes, the DHN20 features an auto mode. The built-in air quality sensor detects particulate levels and automatically adjusts the fan speed to efficiently purify the room, saving energy while maintaining clean air.
What is the recommended room size for the Welltec DHN20?
The DHN20 is designed for rooms up to 30 m² (about 323 sq ft). For best performance, place the unit in the room where you spend the most time and keep doors and windows closed during operation.
Can I leave the air purifier on all night?
Yes, you can safely run the DHN20 24/7. The unit uses only 30 W at maximum speed, and the sleep-friendly low speed produces only 25 dB of noise. The timer function lets you set 1 to 8 hours of operation.
What does the child lock function do?
The child lock prevents accidental changes to settings by disabling the control panel buttons. To activate it, press and hold the lock key for 3 seconds. A lock icon appears on the display.
How do I know when to replace the filters?
The DHN20 has a filter replacement indicator that lights up when the HEPA/carbon filters need to be changed. You can also monitor air quality with the particle sensor indicator; a drop in performance is a sign to inspect filters.
Is the Welltec DHN20 suitable for allergy sufferers?
Yes, the True HEPA H13 filter removes up to 99.97% of airborne particles, including dust mites, pollen, pet dander and fine particulate matter (PM2.5). The activated carbon layer also helps absorb odors and VOCs, making it beneficial for people with allergies or asthma.
Can I control the air purifier with a remote?
Yes, the DHN20 comes with a remote control, allowing you to adjust fan speed, timer, and even the child lock from a distance. Make sure the sensor on the unit is not obstructed, and keep the remote within 5 meters of the purifier.
User questions about DHN20 Welltec
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USER MANUAL DHN20 Welltec
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Product information
Brand : Welltec
Model : DHN20
Category : Air purifier