YIDINGAIR FILTRATION
Product overview
What it is and where it fits.
The AR301 / AR304 Hi-PACK is a box-type HEPA filter for air handling units, duct housings and final filter banks. Instead of deep pleats held apart by aluminium separators, it uses continuous mini-pleat glass-fibre media with hot-melt spacing, packing a large filtration area into a standard 292 mm deep frame.
Without metal separators the filter is lighter and the media has no sharp edges pressing on it. Frames are available in wood, galvanised steel, aluminium or stainless steel, as a box, single-flange or double-flange version.
- Filter type
- Box-type mini-pleat HEPA (separator-free)
- Listed efficiency grades
- 99.97% and 99.99% (catalogue range 95% – 99.999% at 0.3 µm)
- Depth
- 292 mm
- Standard sizes
- 287/305 × 592/610 mm and 592/610 × 592/610 mm
- Frame materials
- Wood, galvanised steel, aluminium, stainless steel
- Frame formats
- Box, single flange, double flange
- Gasket
- Neoprene
- Max. continuous temperature
- 60 °C
Typical applications
- Final HEPA stage in air handling units serving cleanrooms
- Duct-mounted and wall-mounted HEPA housings
- Pharmaceutical, hospital and laboratory supply air
- Replacement for separator-type HEPA filters of the same face size
Construction & performance
Design
Continuous mini-pleat media provides a large filtration area without the traditional aluminum separators. Hot-melt adhesive maintains pleat spacing.
Materials & options
Micro-glass fiber media, with wood, galvanized steel, aluminum or stainless steel frame options. Box, single-flange and double-flange configurations and protective mesh are available.
Efficiency selection
Efficiency grades from 95% to 99.999% at 0.3 µm, tested to EN 1822. Specify the grade, airflow and test report required for your order.
Selection guide
How to choose.
Match the housing format
Box frames slide into side-access housings; single- or double-flange frames are clamped against a wall or frame. Tell us how the existing filter is held and sealed.
Confirm the module size
Two families are listed: 592 mm (EU module) and 610 mm (24 in). Measure the frame and send the actual dimensions.
Pick the frame material for the environment
Wood and galvanised steel suit general HVAC; aluminium saves weight; stainless steel suits humid or corrosive service and frequent cleaning.
Technical data
Specifications & dimensions.
Rated airflow in m³/h, pressure drop in Pa, actual dimensions in mm, nominal sizes in inches. Swipe tables sideways on small screens.
| Particle size | Efficiency |
|---|---|
| 0.3 µm | 95.00% |
| 99.97% | |
| 99.99% | |
| 99.999% | |
| 0.1–0.2 µm | ≥ 99.999% |
| Test standard: EN 1822 | |
| Efficiency (%) | Nominal size (in) | Actual size (mm) | Rated airflow (m³/h) | Pressure drop (Pa) | ||
|---|---|---|---|---|---|---|
| Initial pressure drop | Final pressure drop | |||||
| 99.97 | 12 × 24 × 12 | 287 × 592 × 292 | 1500 | 300 | 500 | |
| 24 × 24 × 12 | 592 × 592 × 292 | 3000 | ||||
| 99.99 | 12 × 24 × 12 | 305 × 610 × 292 | 1700 | |||
| 24 × 24 × 12 | 610 × 610 × 292 | 3400 | ||||
| Type | Specification | |||
|---|---|---|---|---|
| Construction | Filter media | Micro-glass fiber paper | ||
| Support material | Corrugated separator | |||
| Sealant | PU BASE | |||
| Gasket material | Neoprene rubber | |||
| Frame material | Metal frame | |||
| Frame type | Box type | Single flange | ||
| Operating conditions | Maximum continuous temperature | ℃ | 60 | |
| Maximum relative humidity | %RH | 100 (non-condensing) | ||
Catalogue values at rated airflow. Test data for your exact configuration is available on request.
Original Yiding catalogue (Chinese) ↗FAQ
Common questions.
What does 'separator-free' mean?+
Traditional deep-pleat HEPA filters use corrugated aluminium separators between pleats. A mini-pleat pack keeps its pleat spacing with hot-melt adhesive beads instead, which saves weight and allows more media in the same frame.
Is the Hi-PACK a direct replacement for a separator HEPA filter?+
In most housings, yes — the 292 mm depth and 592/610 mm face sizes match common separator filters. Confirm the gasket position and the airflow you need so we can check the pressure drop.
Which frame material should I choose?+
Galvanised steel or wood is common for general HVAC, aluminium where weight matters, and stainless steel for humid or corrosive environments or where frames are cleaned regularly.
Can you add a protective guard?+
Yes, protective mesh can be specified on the upstream, downstream or both faces.
