A Terminal HEPA filter box is an end-of-line air filtration device installed in cleanrooms. It is designed for direct connection to the ductwork and is widely used in HVAC purification systems across various industries.
Product Features
- The plenum box is constructed from painted steel sheet or stainless steel, featuring an integrated (one-piece) structural design.
- The filter is replaceable. It does not need to be replaced together with the housing, significantly reducing costs.
- A perforated equalizing plate is installed at the air inlet of the plenum box to improve air supply uniformity and protect the HEPA filter.
- Lightweight construction allows for easier installation, making it particularly suitable for cleanrooms with aluminum alloy T-bar (grid) ceiling systems.
- An optional volume control damper is available.
Applications
Ideal for terminal air filtration in HVAC purification systems across various industries. Commonly installed in cleanrooms requiring ISO Class 5 to Class 8 (Class 100 to 100,000) cleanliness levels, including pharmaceutical, microelectronics, healthcare, and food processing facilities.
Parameters
|
Filter Size |
Cabinet Dimension (Ceiling Supply Air) |
Cabinet Dimension (Side Supply Air)) |
Rated Air Volume |
Circular Interface Dimension |
Square Interface Dimension |
Initial Filter Resistance |
|
|
L*W*H |
L*W*H |
L*W*H |
m³/h |
(mm) |
(mm) |
H13(Pa) |
H14(Pa) |
|
350x350x70 |
400x400x250 |
400x400x450 |
500 |
Ø250 |
200x200 |
280 |
300 |
|
500x500x70 |
550x550x250 |
550x550x450 |
1000 |
Ø300 |
300x200 |
280 |
300 |
|
610x610x70 |
660x660x250 |
660x660x450 |
1500 |
Ø350 |
400x200 |
280 |
300 |
|
870x570x70 |
920x620x250 |
920x660x450 |
2000 |
Ø350 |
500x200 |
250 |
280 |
|
1170x570x70 |
1220x620x250 |
1220x620x450 |
2500 |
Ø300x2 |
630x200 |
250 |
280 |
|
1220x610x70 |
1270x660x250 |
1270x660x450 |
3000 |
Ø300x2 |
630x250 |
250 |
280 |
|
Customizable |
|||||||
FAQ
Q: How is the HEPA Filter Box installed in a T-grid ceiling?
A: The unit is designed to sit directly on the T-grid bars. Its lightweight construction allows for easy placement, and a sealed edge (using silicone or gasket) ensures an airtight fit between the unit and the ceiling frame.
Q: What is the advantage of the one-piece plenum design?
A: The integrated construction eliminates potential air leak paths found in multi-piece assemblies. It ensures structural rigidity and maintains the internal pressure integrity required for optimal HEPA filter performance.
Q: Does the unit come with a damper?
A: A volume control damper is available as an optional accessory. It is installed at the inlet duct connection to allow precise balancing of airflow to meet specific cleanroom pressurization and air change rate requirements.
Q: How often should the HEPA filter be replaced?
A: Replacement frequency depends on the pre-filtration efficiency and the cleanliness of the upstream air. Typically, HEPA filters in terminal units have a lifespan of 2-5 years. We recommend monitoring the pressure drop across the filter; replacement is generally needed when the final resistance exceeds twice the initial resistance.
Q: Q: What cleanliness levels are these units suitable for?
A: Our HEPA terminal units are suitable for cleanrooms requiring ISO Class 5 to ISO Class 8 (formerly Class 100 to 100,000) environments. For applications requiring ISO Class 1-4, we recommend using ULPA filter terminal units.