APH450D - Air purifier Welltec - Free user manual and instructions
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| Product Type | Air Purifier |
| Brand | Welltec |
| Model | APH450D |
| Recommended Room Size | Up to 450 sq ft (42 m²) |
| Dimensions (W x H x D) | 8.7 x 14.2 x 8.7 in (22 x 36 x 22 cm) |
| Weight | 5.5 lbs (2.5 kg) |
| Power Supply | AC 120V, 60Hz |
| Power Consumption | 40W |
| Noise Level | 25–50 dB |
| CADR (Dust/Pollen/Smoke) | 200/210/180 m³/h |
| Filtration Technology | 3-Stage: Pre-filter, HEPA H13, Activated Carbon |
| Air Quality Sensor | Yes (PM2.5 laser sensor) |
| Auto Mode | Yes |
| Timer | 1/2/4/8 hours |
| Fan Speeds | 3 speeds (Sleep, Medium, High) |
| Control Type | Touch panel & remote control |
| Filter Replacement Indicator | Yes |
| Filter Maintenance | Replace HEPA every 6–12 months; clean pre-filter every 2 weeks |
| Safety Features | Overheat protection, child lock |
| Reparability | Easy filter access; spare filters available |
Frequently Asked Questions - APH450D Welltec
How often should I replace the filter?
The HEPA filter should typically be replaced every 6 to 12 months depending on air quality and usage frequency. The filter replacement indicator will alert you when it's time.
Can I wash the HEPA filter?
No, the HEPA filter is not washable. Washing can damage the fibers. Only the pre-filter is washable and should be vacuumed or rinsed with water.
How do I clean the pre-filter?
Remove the rear cover, take out the pre-filter, and clean it with a soft brush or vacuum cleaner. If very dusty, rinse it under lukewarm water and let it dry completely before reinstalling.
Is the air purifier noisy?
Noise levels range from 25 dB on sleep mode to 50 dB on high speed, making it quiet enough for bedrooms and offices.
Can I leave it running all day?
Yes, the APH450D is designed for continuous operation with low power consumption. The auto mode adjusts fan speed based on air quality to save energy.
How do I reset the filter replacement indicator?
After replacing the filter, press and hold the Filter Reset button for 3 seconds until the indicator light turns off. Refer to the manual for exact button location.
Which room size is suitable for this air purifier?
It is recommended for rooms up to 450 square feet (42 m²). For larger spaces, you may need multiple units or higher settings.
Does it remove odors and smoke?
Yes, the activated carbon filter absorbs odors, smoke, and volatile organic compounds (VOCs), while the HEPA filter captures particles like dust and pollen.
Is it safe for pets and children?
The unit includes child lock to prevent accidental settings changes. Its cool-touch exterior and overheat protection make it safe to operate around pets and children.
How do I use the auto mode?
Press the Auto button on the touch panel or remote. The built-in air quality sensor detects pollution levels and automatically adjusts fan speed to maintain clean air.
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USER MANUAL APH450D Welltec
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Product information
Brand : Welltec
Model : APH450D
Category : Air purifier