Astberg APB100 Purification Filter Box: HEPA and Carbon Filtration for 100 mm (4") Duct Ventilation
Astberg APB100 Purification Filter Box: HEPA and Carbon Filtration for 100 mm (4") Duct Ventilation
Astberg APB100 Purification Filter Box: Three-Stage HEPA and Carbon Air Purification for 4" Duct Ventilation
The Astberg APB100 is a 100 mm duct-mounted filter box with a primary filter, HEPA filter, and activated carbon filter. Paired with a silent 4" fan, it cleans incoming air of PM2.5, odours, and formaldehyde before it reaches your rooms.
Price: Rs. 8,490 (MRP Rs. 10,490, 19% off)
Why Does Ventilation Alone Fail During a Severe Pollution Crisis?
When outdoor smog peaks, bringing in fresh air can mean bringing in pollution. Closing the windows blocks some of it, but it also traps CO₂, moisture, and chemical vapours from paint, furniture, and cleaning products.
A home air purifier cleans the air already in a room, but it doesn’t replace stale air. Ventilation replaces stale air, but unfiltered ventilation pulls outdoor pollutants inside.
Combining both is the ultimate solution. A ducted ventilation system brings in fresh air, and a filter stage cleans it first. The APB100 provides that filter stage for small 4" duct systems, adding true air purification to ducted ventilation.
What Is the Astberg APB100?
The APB100 is a purification filter box that connects to a 100 mm (4") duct. It doesn’t move air by itself. You pair it with a silent 4" fan, and the box filters the air passing through.
Its compact size suits hidden installations in ceiling voids, bathrooms, and small service spaces. It also fits sensitive environments such as hospitals and laboratories.
Three-Stage Filtration
- Primary filter: captures larger particles and dust, protecting the stages behind it
- HEPA filter: removes fine particles, including PM2.5
- Activated carbon filter: adsorbs odours and chemical pollutants such as formaldehyde
How Do HVAC, Duct, AHU, and Exhaust Fan Work Together With a HEPA Filter?
Healthy indoor air needs a complete air set: fan, filter, duct, and extraction. Each part has its own job.
The Role of Each Component
- Duct network: The pathway that carries air. The APB100 connects inline to a 100 mm duct.
- Ventilator or inline fan: The fan pushes or pulls air through the duct and filter box. Pair the APB100 with a silent 4" fan sized for your airflow.
- HEPA filter and carbon: The HEPA stage handles fine particles, while activated carbon targets odours and chemical vapours. Together they cover both particulates and gases.
- HVAC: The system that heats, cools, and circulates air. Most HVAC systems recirculate indoor air, so a filtered fresh air branch adds clean outdoor air.
- AHU (Air Handling Unit): In large buildings, an AHU conditions and distributes air centrally. The APB100 gives small rooms and single-zone systems a similar filtration stage without a full AHU.
- Exhaust fan: Stale air needs a way out. An exhaust fan or ventilator in the kitchen or bathroom lets exhaust air leave while filtered fresh air comes in.
The Airflow Path in Four Steps
- The fan draws outdoor air into the duct.
- The primary filter removes larger particles.
- The HEPA and activated carbon filters remove fine particles, odours, and chemical vapours.
- Clean air enters the room while an exhaust fan removes stale air.
Key Features of the APB100
- Three-stage filtration: primary filter, HEPA filter, activated carbon filter
- PM2.5 and formaldehyde filtration
- Tool-free filter replacement for fast maintenance and less downtime
- 100 mm (4") duct connection
- Compact design for hidden installation
- Works with a silent fan for quiet operation
- Robust build designed for long life with minimal maintenance
- Supply and exhaust use: air filters can be used in supply air streams or exhaust air streams
Technical Specifications
| Specification | Value |
|---|---|
| Model | Astberg APB100 |
| Type | Purification filter box (passive, requires a fan) |
| Duct size | 100 mm (4") |
| Filtration stages | Primary filter, HEPA filter, activated carbon filter |
| Target pollutants | PM2.5, formaldehyde, odours |
| Filter replacement | Tool-free |
Where Does the APB100 Work Best?
- Bedrooms and small living spaces: filtered fresh air for individual rooms
- Home offices: quiet, filtered ventilation for workspaces
- Hospitals and clinics: cleaner supply air in small sensitive spaces
- Laboratories: filtration for controlled environments
- Small commercial rooms: dust and odour control
Frequently Asked Questions
How does an AHU differ from a standard home air purifier?
An AHU is a central unit that conditions and distributes air through ductwork across a whole building. A standard home air purifier only filters recirculated air in one room. A duct filter box like the APB100 sits between the two: it filters air inside a small duct, so you get clean fresh air without a full AHU.
Does the APB100 need a fan to work?
Yes. The APB100 is a filter box and has no motor of its own, so it needs a silent 4" inline fan or ventilator to move air through it. Size the fan for the added resistance of the HEPA and carbon filters, because small 4" fans can lose airflow quickly.
Can a duct filter box replace a home air purifier?
For many rooms, yes. The APB100 filters incoming air with a HEPA filter and activated carbon, and your ventilation system keeps that air flowing through the room. It does not recirculate room air, so some users keep a portable purifier for spot cleaning.
Add True Air Purification to Your 4" Duct Ventilation with the APB100
Stop choosing between fresh air and clean air. The Astberg APB100 filters your ducted ventilation with HEPA and carbon, and the filters change without tools.
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.
