HEPA Aluminum Separator Filter - for AHU - HEPA / ULPA Filters | Baisheng Tech
Product ID:hepa-aluminum-separatorHEPA / ULPA FiltersHEPA/ULPA High-Efficiency Filters
HEPA / ULPA Filters

HEPA Aluminum Separator Filter - for AHU

Product Overview

An HEPA aluminum-separator filter is the deep-pleat high-efficiency filter used in the final stage of an air handling unit (AHU): glass-fiber media is pleated deeply, with corrugated aluminum separators holding the pleats apart, in 150 or 290 mm depths. In the same 610×610 opening, the 150 mm standard version is rated at about 17 CMM, the 290 mm standard at about 32.6 CMM and the 290 mm high-capacity version at about 56.6 CMM. Efficiency 95–99.99% (@0.3 μm); wood, galvanized steel, aluminum or stainless steel frames.

Key Specifications

Filtration Efficiency
95 / 99.95 / 99.97 / 99.98 / 99.99% @0.3μm
Depth
150 / 290 / 292 mm
Rated Airflow
Standard-capacity and high-capacity versions
Frame
Wood, galvanized steel, aluminum or stainless steel frame
Filter Media
Glass fiber
Frame
Wood, galvanized steel, aluminum or stainless steel frame
Separator
Aluminum separators that layer the media for even airflow
Filtration Efficiency
95 / 99.95 / 99.97 / 99.98 / 99.99% @0.3μm
Rated Airflow
Standard-capacity and high-capacity versions
Depth
150 / 290 / 292 mm
ModelDescriptionSize
SH99-305-305-150-ALAluminum separator type HEPA 99.99% 305X305X150mm aluminum frame305 × 305 × 150 mm
SH99-305-305-292Aluminum separator type HEPA 99.99% 305X305X292mm305 × 305 × 292 mm
SH97-305-610-292-1000CFMAluminum separator type HEPA 99.97% 305X610X292 1000CFM galvanized frame305 × 610 × 292 mm
SH99-610-610-290-W-2000CFMAluminum separator type HEPA 99.99% 610X610X290 wooden frame 2000CFM610 × 610 × 290 mm
SH99-610-1220-150-WStandard airflow HEPA 99.99% 610X1220X150mm aluminum separator type, wooden frame, downstream gasket610 × 1220 × 150 mm
SH97-610-610-292-2000CFMAluminum separator type HEPA 99.97% 610X610X292 2000CFM galvanized frame610 × 610 × 292 mm
SH99-600-1210-150Aluminum separator type HEPA 99.99% 600X1210X150mm anodized aluminum frame600 × 1210 × 150 mm
SH99-570-570-150-GA-HHigh airflow high-efficiency filter 99.99% 570X570X150mm aluminum separator type, galvanized frame, downstream gasket 23.4CMM/25.4mmaq570 × 570 × 150 mm

Common sizes are listed above. Other sizes, frame materials and efficiency grades can be made to order — please quote the model or size when requesting a quotation.

Detailed Description

An HEPA aluminum-separator filter is the deep-pleat high-efficiency filter used in the final stage of an air handling unit (AHU). Glass-fiber media is pleated deeply, and a corrugated aluminum separator sits between every two pleats to hold the media open at an even spacing so air passes through uniformly. Common depths are 150 mm and 290/292 mm — much deeper than a mini-pleat HEPA (50/70 mm) — so far more air can pass through the same opening. Efficiencies are 95%, 99.95%, 99.97%, 99.98% and 99.99% (@0.3 μm). HEPA usually means 99.97% or higher at 0.3 μm, so the 95% grade is not strictly a HEPA filter and is used where requirements are lower.

How much air can the same 610×610 opening handle?

The deeper the filter and the more media it holds, the more air it can pass. The chart shows rated airflow and initial pressure drop for each version in the same 610×610 mm opening:

How much air can the same 610×610 opening handle?

Rated airflow and initial pressure drop (supplier quotations and model ratings)

02040Rated airflow (CMM)Mini-pleat 70 mm (reference)10 CMM123 PaSeparator 150 mm standard17 CMM249 PaSeparator 150 mm high capacityapprox. 27 CMM249 PaSeparator 292 mm standard32.6 CMM249 PaSeparator 290 mm high capacity56.6 CMM333 Pa

The 150 mm high-capacity value is scaled by area from the 23.4 CMM of the 570×570 model. Values come from different quotations and model ratings and show the trend; the shipping specification governs.

VersionDepthRated airflowInitial pressure drop
Mini-pleat HEPA (for comparison)70 mmAbout 10 CMMAbout 123 Pa
Aluminum separator, standard150 mm17.0 CMMAbout 249 Pa
Aluminum separator, high capacity150 mmAbout 27 CMMAbout 249 Pa
Aluminum separator, standard292 mm32.6 CMMAbout 249 Pa
Aluminum separator, high capacity290 mm56.6 CMM (2000 CFM)About 333 Pa
The 27 CMM for the 150 mm high-capacity version is scaled by area from the 23.4 CMM of the 570×570 mm model. Pressure drops were originally given in mmH₂O: 25.4 mmH₂O ≈ 249 Pa and 34 mmH₂O ≈ 333 Pa.

Standard vs high capacity

The high-capacity version folds more media into a frame of the same size, so the same opening passes more air. At 150 mm depth, the high-capacity version has the same initial pressure drop as the standard, about 249 Pa; at 290 mm depth, airflow rises from 32.6 CMM to 56.6 CMM and pressure drop from about 249 Pa to about 333 Pa. Actual values for other sizes:
Frame size (mm)VersionRated airflowInitial pressure drop
610×1220×150Standard35.4 CMM (1250 CFM)About 249 Pa
570×570×150High capacity23.4 CMMAbout 249 Pa
570×1170×150High capacity49.4 CMMAbout 249 Pa
305×305×290High capacity11 CMMAbout 333 Pa
For sizes not listed, airflow and pressure drop are provided per selection.

Frames, gaskets and other options

- Frame: wood, galvanized steel, aluminum or stainless steel (SUS304/316) - Gasket: outlet side, inlet side, or both sides - Depth: most commonly 150 mm (about 5⅞″) and 290/292 mm (292 mm is about 11½″); also 266, 300 and 305 mm - Width and height: besides the 305 and 610 series, many non-standard sizes are made - For hot environments there are 150–300°C stainless-frame versions; see the high-temperature filters

Where it is used

- The final (HEPA) stage of air handling units for cleanrooms and clean areas - Where high airflow is needed and the AHU has enough depth; where depth is limited, use a mini-pleat HEPA instead
In the same 610×610 opening, how much air do the 150 and 290 mm, standard and high-capacity versions handle?

150 mm standard is about 17.0 CMM and high capacity about 27 CMM, both at about 249 Pa initial pressure drop; 292 mm standard is about 32.6 CMM at about 249 Pa; 290 mm high capacity is about 56.6 CMM (2000 CFM) at about 333 Pa. For comparison, a 70 mm mini-pleat in the same opening handles about 10 CMM at 123 Pa at 0.45 m/s. The US Department of Energy standard DOE-STD-3020 rates a 610×610×292 HEPA at 1000 CFM with a maximum pressure drop of 250 Pa, which can serve as a reference.

The specification says 290, 292 or 300 mm. Does it matter?

Yes — measure how deep the frame on site actually allows. 292 mm is the metric equivalent of 11½″, while 290 mm is a common metric depth; we make both, plus 300 and 305 mm. Customers have specified depths such as 250 or 310 mm, which are not standard for us and need to be confirmed. When replacing, measuring the actual depth of the old filter is the most reliable.

The specification says "EN 779 H13". Can you supply that?

The wording itself is inconsistent: EN 779 only has G, M and F classes and was replaced by ISO 16890 in 2018; H13 is an EN 1822 class requiring overall efficiency of 99.95% or higher. Our aluminum-separator filters are rated by efficiency at 0.3 μm (95–99.99%). If your specification requires EN 1822 H13 with a classification report, please say so in your inquiry and we will select accordingly.

For the same 610×610×290 size, how do I tell an aluminum-separator filter from a V-type?

Look from the side: the aluminum-separator type is one block of deeply pleated media with corrugated aluminum strips between the pleats; a V-type has several thin mini-pleat panels arranged in a V, with no aluminum strips. Both can share the same frame size but differ in pressure drop and airflow — for example, one 610×610×290 V-type is rated at 50 CMM at about 249 Pa. The size alone is not enough to tell them apart, so please include a photo of the old filter with your inquiry.

Can you make non-standard sizes such as 590×590×250?

Width and height, yes — besides the 305 and 610 series we have made many non-standard sizes, such as 289×595, 525×505 and 700×700. Depth is more limited: standard depths are 150, 266, 290, 292, 300 and 305 mm, and a depth such as 250 mm must first be confirmed with production. Please give width × height × depth, efficiency, frame material, which face the gasket is on, and the quantity.

Selection References

Before ordering, verify the efficiency grade, media type, and whether the operating environment fits your requirements.