Reverse-Side Gel Seal Ceiling HEPA Filter (RSR: Room-Side Replacement)
The reverse-side gel seal ceiling HEPA filter (RSR) delivers final-stage particle filtration in cleanroom terminal systems. In addition, it lets the filter be replaced by the controlled room itself. Therefore, it suits applications that require room-side service.
The reverse L-type side gel seal sits at the mid-level of the frame. Together with a matching terminal box, it forms a continuous sealing line. As a result, leakage risk is limited. Moreover, the product is available in E10, E11, E12, H13 and H14 classes. It is used mainly in pharmaceutical, hospital, microelectronics, food and precision production areas.
What Is a Reverse-Side Gel Seal Ceiling HEPA Filter?
RSR stands for “Room Side Replacement”. In short, it means the filter can be removed and replaced from the controlled room. As a result, it offers a clear advantage where access to the technical space above the ceiling is limited. In addition, the change can be planned directly from the cleanroom side. Correct cleanroom system selection is critical at this point.
Unlike standard gel seal ceiling filters, this model places the reverse L-type gel bed on the side face and mid-level of the frame. The knife profile of a matching terminal box then seats into the gel bed. Consequently, a circumferential sealing line forms between the filter and the terminal box.
The real performance of the filter depends on several variables. For example, filter class, terminal box geometry and gel bed condition are among them. In addition, mounting tolerances, face velocity, air flow, pressure difference, pre-filtration level and process conditions also affect the outcome.
Selection, Installation and Replacement Process
Technical Specifications
| Filter standard | EN 1822 and ISO 29463 | Max. operating temperature | 80°C |
|---|---|---|---|
| Filter classes | E10, E11, E12, H13 and H14 | Surface protection | Painted aluminium sheet |
| Filter media | High-quality glass fibre | Seal system | Reverse L-type liquid gel seal |
| Frame type | Aluminium | Sealing compound | Two-component polyurethane |
| Recommended final pressure loss | 2× the initial pressure loss, max. 600 Pa | Separator | Hot melt glue |
Product Coding System
| Filter Type | Filter Class | Frame | Pleat Height | Design | Dimensions | Surface Protection | Seal |
|---|---|---|---|---|---|---|---|
| AR: Reverse-Side Gel Seal Ceiling HEPA Filter |
E10 E11 E12 H13 H14 |
A: Aluminium | 2: 65 mm | RJ: Reverse-side gel type | W × H × D Example: 610 × 610 × 90 mm |
FW: No protection FC: Clean side FD: Dirty side FB: Both sides |
G: Gel seal |
HEPA Filter Models and Performance Values
The table below shows the nominal performance values of the standard H13 and H14 reverse-side gel seal models. In addition, E10, E11 and E12 options can be evaluated separately per project requirement.
| Filter Model | EN 1822 | ISO 29463 | Dimensions W × H × D (mm) |
Filtration Area (m²) |
Pleat Height (mm) |
Nominal Air Flow (m³/h) |
Initial Pressure (Pa) |
|---|---|---|---|---|---|---|---|
| AR-H13-A-2-RJ-339-339-90-FB-G | H13 | ISO 35 H | 339 × 339 × 90 | 2.9 | 65 | 150 | 85 |
| AR-H13-A-2-RJ-339-644-90-FB-G | H13 | ISO 35 H | 339 × 644 × 90 | 5.8 | 65 | 300 | 85 |
| AR-H13-A-2-RJ-491-491-90-FB-G | H13 | ISO 35 H | 491 × 491 × 90 | 6.6 | 65 | 340 | 85 |
| AR-H13-A-2-RJ-644-644-90-FB-G | H13 | ISO 35 H | 644 × 644 × 90 | 11.7 | 65 | 600 | 85 |
| AR-H13-A-2-RJ-644-949-90-FB-G | H13 | ISO 35 H | 644 × 949 × 90 | 17.5 | 65 | 900 | 85 |
| AR-H13-A-2-RJ-644-1254-90-FB-G | H13 | ISO 35 H | 644 × 1254 × 90 | 23.4 | 65 | 1200 | 85 |
| AR-H14-A-2-RJ-339-339-90-FB-G | H14 | ISO 45 H | 339 × 339 × 90 | 3 | 65 | 150 | 110 |
| AR-H14-A-2-RJ-339-644-90-FB-G | H14 | ISO 45 H | 339 × 644 × 90 | 6 | 65 | 300 | 110 |
| AR-H14-A-2-RJ-491-491-90-FB-G | H14 | ISO 45 H | 491 × 491 × 90 | 6.9 | 65 | 340 | 110 |
| AR-H14-A-2-RJ-644-644-90-FB-G | H14 | ISO 45 H | 644 × 644 × 90 | 12.2 | 65 | 600 | 110 |
| AR-H14-A-2-RJ-644-949-90-FB-G | H14 | ISO 45 H | 644 × 949 × 90 | 18.3 | 65 | 900 | 110 |
| AR-H14-A-2-RJ-644-1254-90-FB-G | H14 | ISO 45 H | 644 × 1254 × 90 | 23.4 | 65 | 1200 | 110 |
Custom width, height and depth can be evaluated based on terminal box, ceiling module and project requirements.
Excluding the flange, the net filter width and height are 34 mm smaller than the outer product dimensions.
A ±10% tolerance may occur in differential pressure values, depending on production, measurement and test conditions.
Structural Components
Application Areas
The ceiling HEPA filter is preferred in many sectors where hygiene is critical. In particular, it is widely used in cleanroom system applications.
Product Advantages
- Filter replacement from the controlled room side
- Different efficiency classes from E10 to H14
- Reverse L-type gel bed at the mid-level of the frame
- Compact, low-weight aluminium structure
- Individual test certificate option under EN 1822 and ISO 29463
- Mini-pleat structure supporting balanced air velocity distribution
- Custom-size production capability
- Single or double-sided surface protection options
- Side seal geometry suited to terminal box applications
- Design suited to room-side maintenance and validation access
Filter Selection Criteria
- Cleanroom class and the particle control requirement of the process
- Need for E10, E11, E12, H13 or H14 filter class
- Actual and nominal air flow per filter
- Knife profile and gel bed dimensions of the terminal box
- Suitability of flange, ceiling module and mounting clearances
- Removal and service distance on the room side
- Initial pressure loss and the usable static pressure of the fan
- Surface protection on the clean, dirty or both sides
- Pre-filtration, dust load, humidity, temperature and other process conditions
Inspection, Maintenance and Filter Replacement
The differential pressure of the filter should be monitored regularly and recorded in operating logs.
The gel surface must be free of fouling, permanent deformation, gaps or damage that could affect the seal.
During replacement, area isolation, personal protective equipment and contamination control procedures must be applied.
After installing the new filter, the aerosol seal test, air flow and required cleanroom checks must be repeated.
The air flow and initial pressure loss values in the table are nominal product data. The real performance may vary with conditions. For example, air density, face velocity, terminal box geometry and the gel bed-knife profile fit affect the result. In addition, mounting tolerances, aerosol type, measuring device, calibration status, filter load, humidity and temperature also play a role. Therefore, the final product choice should follow the project calculation and validation requirements. For more on HEPA filter classes and efficiency, see the HEPA standard reference.
Reverse-Side Gel Seal Ceiling HEPA Filter (RSR: Room-Side Replacement)
Contact Airtes to select a HEPA filter suited to your cleanroom class, terminal box geometry, air flow and room-side replacement needs.
