Astberg AF Series Silent Mixflow Inline Duct Fan (100–315 mm)
Astberg AF Series Silent Mixflow Inline Duct Fan (100–315 mm)
The Astberg AF Series is a range of silent mixed-flow inline duct fans in six sizes, from the compact AF100P for a single bathroom to the AF315 for large commercial duct runs. Pick the size that matches your duct diameter and the airflow you need.
Specifications by size
| Model | Duct size | Max. airflow | Max. pressure | Noise (high/low) | Power | Net weight | Colour |
|---|---|---|---|---|---|---|---|
| AF100P | 100 mm (4") | 198 m³/h (117 CFM) | 156 Pa | 31/26 dB(A) | ~25 W | 1.5 kg | Black |
| AF125 | 125 mm (5") | 284 m³/h (167 CFM) | 159 Pa | 31/26 dB(A) | – | 1.5 kg | Black |
| AF150 | 150 mm (6") | 530 m³/h (311 CFM) | 300 Pa | 33 dB(A) | – | 2.6 kg | Black |
| AF200 | 200 mm (8") | 840 m³/h (494 CFM) | 352 Pa | 63/55 dB | 128 W | 4.9 kg | Black |
| AF250 | 250 mm (10") | 1405 m³/h (826 CFM) | 352 Pa | 66/58 dB | 225 W | 7.5 kg | White |
| AF315 | 315 mm (12") | 2206 m³/h (1298 CFM) | 693 Pa | 63 dB | 275 W | 11 kg | White |
All models run on 220 V / 50 Hz and have two speeds. The performance curve for each size is in its photos.
Features
- Mixed-flow impeller: combines axial airflow with centrifugal pressure, so the fan keeps moving air through long runs and bends.
- Two speeds: run quietly on low and switch to high when you need more extraction.
- ABS body, double insulated: light but strong, corrosion-free, and no earthing needed.
- Snap-joint fitting: quick installation with a good seal.
- Easy servicing: the motor and impeller sit in the centre section and come out without disturbing the ducting.
- Any angle: mount horizontally, vertically or at an angle anywhere along the duct, and connect fans in series for more pressure.
Where to use it
- Homes: bathrooms, kitchens and laundry rooms (AF100P–AF150).
- Offices and hospitality: conference rooms, offices, hotel rooms and washrooms (AF150–AF250).
- Commercial and specialty: large spaces, long duct runs, warehouses and grow rooms (AF200–AF315).
FAQ
Can it be used for both intake and exhaust?
Yes. Install it in either direction to extract stale air or bring in fresh air.
Can it run 24/7?
Yes. The motor is thermally protected and designed for continuous running.
Can I install it myself?
Yes. Connect it to a rigid or flexible duct of the same diameter, mount it with the bracket, and wire it to the supply. No special tools are needed.
Which size do I need?
Start with your duct diameter, then check the airflow in the table above. Call us on 82880-21001 if you are unsure.
NET ZERO EMISSION
GREEN ENERGY
CO2 Control
Green Buildings
Engineered Airflow
Air in motion. Carbon at rest.
Every Astberg unit is tuned to move the maximum volume of air with the minimum draw of power — so your building breathes freely while the grid barely notices.
Air Quality Metrics
Measurable impact, every minute.
Aggregate performance from Astberg installations across commercial, residential and healthcare deployments.
Lower CO₂
Lower PM2.5
Lower PM10
Lower VOC
Fresh Air Exchange
The Air Path
How it breathes.
Four stages between stale and fresh. Follow the air through the unit.
Green Impact Estimator
What efficiency gives back.
Slide to match how you would run this unit. We will do the maths on the energy, money and carbon it hands back — every single year.
Your usage
Estimates compare this unit's rated draw against a conventional AC fan of similar airflow, at your local grid emission factor. Actual figures vary with speed setting and duct design.
Acoustics
Powerful. Not loud.
Thousands of cubic metres of air every hour, engineered to stay out of your conversations. Here is where this unit sits on the sound scale.
Sound pressure in dB(A), typical values at 3 m. The scale is logarithmic — every 10 dB drop is roughly half the perceived loudness.
