Gel Seal Terminal Housing

A gel seal HEPA terminal housing is used as the final air supply unit in cleanroom HVAC systems. It combines a HEPA filter, terminal housing, air diffuser, inlet damper and test port into one ceiling-mounted supply unit.

The gel seal structure helps improve the sealing contact between the HEPA filter and the terminal housing. Compared with a standard gasket seal, the gel seal design is often selected when the project requires better control of bypass leakage around the filter frame.

ZOSLONG can supply top-inlet and side-inlet gel seal HEPA terminal housings according to the cleanroom ceiling layout, duct connection direction, airflow requirement and filter size.

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Please send us your airflow, ceiling opening size, HEPA filter size, inlet direction and project requirement. We can help check the suitable model and prepare a quotation for standard or customized dimensions.

This product is not only a HEPA filter. It is a complete cleanroom terminal air supply unit.

•A standard configuration may include:

•HEPA terminal housing

•Gel seal HEPA filter

•Air diffuser

•Air inlet flange

•Volume control damper

•Air distribution plate

•DOP/PAO injection and sampling port

•Filter pressing block and fixing components

•Suspension holes for ceiling installation

The final configuration can be adjusted according to project drawings and installation requirements.

Two inlet structures are available for different cleanroom ceiling and duct layouts.

 

 

Top-Inlet Gel Seal HEPA Terminal Housing

The top-inlet design is suitable when the air duct connects from above the ceiling. It is commonly used in cleanroom ceiling systems where there is enough space above the terminal unit for duct connection and installation work.

 

Side-Inlet Gel Seal HEPA Terminal Housing

The side-inlet design is suitable when the duct needs to connect from the side of the terminal housing. It is often selected when the ceiling space or duct route does not allow a direct top connection.

Both structures can be supplied with a diffuser, HEPA filter, damper and DOP/PAO test port according to the project specification.

 

 

 

In cleanroom air supply systems, air bypass around the HEPA filter can affect the cleanliness performance of the room. The terminal housing must hold the HEPA filter firmly and provide a stable sealing surface.

A gel seal HEPA terminal housing is selected when the project needs:

•Better sealing contact around the HEPA filter

•Final filtration at the ceiling air supply point

•Convenient DOP/PAO testing access

•Uniform air distribution through a diffuser

•Top-inlet or side-inlet duct connection

•Custom sizes for cleanroom ceiling layouts

•Integration with pharmaceutical, electronics, laboratory or clean production HVAC systems

The actual cleanroom performance still depends on system design, installation quality, airflow balance and on-site testing.

The standard parameter table shows a HEPA filter efficiency of 99.99%.

For engineering projects, the final HEPA grade should be confirmed according to the project specification, selected filter media and test requirement. If the project requires EN 1822 or ISO 29463 classification, scan testing or an individual test report, please confirm this requirement before ordering.

We do not recommend treating "99.99%" as automatically equal to H13 or H14 without checking the test standard, particle size and report conditions.

Note: Non-standard sizes can be customized according to project drawings, ceiling grid, duct connection and airflow requireme

Gel seal HEPA terminal housings are commonly used in cleanroom air supply systems for:

•Pharmaceutical cleanrooms

•Electronics manufacturing areas

•Laboratories

•Hospital clean areas

•Food and beverage clean production zones

•Biotechnology facilities

•Precision manufacturing workshops

•Cleanroom HVAC renovation projects

 

For critical clean zones, the final selection should be checked together with room cleanliness target, airflow rate, ceiling layout, filter grade and on-site validation method.

Before installation, please confirm the ceiling opening, duct connection direction, airflow requirement and filter size.

Recommended checks include:

1.Confirm whether the project needs top inlet or side inlet.

2.Check the housing size and ceiling opening size.

3.Confirm the air inlet duct size and flange direction.

4.Make sure the suspension points are properly supported.

5.Check whether the HEPA filter is correctly seated in the gel seal area.

6.Confirm the diffuser is installed after the filter is fixed.

7.Use the DOP/PAO port only according to the project test procedure.

8.After installation, perform airflow balancing and leakage testing according to the cleanroom validation requirement.

The HEPA filter should be replaced according to pressure drop, cleanliness validation result, operating hours and project maintenance rules.

For gel seal HEPA terminal housings, we focus on housing dimensions, sealing structure, filter matching, diffuser fitting and packing protection.

Typical inspection items include:

•Housing size

•Flange size

•HEPA filter size matching

•Gel seal contact area

•Damper operation

•DOP/PAO port position

•Diffuser fitting

•Surface condition

•Label and packing quantity

Available documents may include product specification sheet, packing list, label file and available HEPA filter test data according to the selected filter and project requirement.

If individual scan test reports, EN 1822 / ISO 29463 classification, DOP/PAO test support documents or third-party testing are required, please confirm before ordering.

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