Pleated Panel Filter
Premium performance and construction
Synthetic, electrostatically charged media
with high dust holding capacity
1", 2" and 4" models
4" filters have pleat stabilizer to ensure uniform
spacing and increase rigidity
Highly efficient electrostatic
filtering material attracts dust and pollen like a magnet.
Captures microscopic airborne dust, pollen, mold spores, pet
dander, bacteria and the particles that carry viruses.
A MERV 11 rating requires a 65% to 80%
efficiency on 1 - 3 micron particles and
greater than 85% efficiency on 3 -10 micron
particles, when tested in accordance with
ASHRAE Test Standard 52.2. PREpleat M11 HC
meets and exceeds these requirements.
New Name and Design for 2018
Designed to meet the demands of the toughest applications, the
PREpleat M11 HC offers a
totally unitized, die-cut box, beverage board frame with double thickness in the perimeter
wall. Extremely strong and durable under normal operating conditions.
The PREpleat M11
HC also has a heavy duty,
expanded metal pleat support grid laminated to the media pack to increase rigidity and
help maintain proper spacing between pleats. Proper pleat spacing ensures maximum efficiency, low resistance, and high dust holding
The media pack is bonded to the frame at all points of contact. This bonding prevents dirty
air bypass and promotes even airflow through the media pack. The
PREpleat M11 HC
construction process results in a filter which is very stable, with no racking or vibration of
the pleats under normal airflow. Pleat stability minimizes the chances of captured particulate shaking loose and re-entering the
To support the increased pleat depth of the 4"
PREpleat M11 HC, a pleat stabilizer is added to maintain proper spacing and improve dust
holding, resulting in longer service life.
Media Pack Support
Retainers - metal
bottle cap retainer is used on custom made filters instead
of a beverage board retainer.
• Both length and width less than 20” - No media retainers
• Either length or width 20” or more - Retainer on air
leaving side only
2" and 4"
• Both length and width less than 14" - No retainer
• Either length or width 14" or greater and both less
than 20" - Retainer on air leaving side only
• Either length or width 20" or greater - Retainer on
Only the width and
length can be custom made. Filter depths cannot be custom
made and are stated according to nominal industry standards.
Actual filter depths are as follows:
Nominal Size (Depth)
In general, all
standard filter sizes are stated according to their nominal size
and not their actual size. This information can be found
on the side of your filter. For example, our standard
PREpleat M11 HC (nominal) 20x20x1 measures (actual) 19-1/2 x 19-1/2 x
3/4. The nominal size represents the size of your filter
rack. The actual size represents the size your filter
needs to be to fit inside your filter rack. If your filter
rack is an odd size, a standard sized filter may not fit
properly. In this case, you would need to order a custom
custom made filters please note that these filters will be made
to your exact specifications ± 1/8 inch. Therefore,
please provide us with the exact width and length of the filter
you are needing. Please be sure to measure exactly for a
snug fit to allow the filter to fit within the rack but without
air seepage around the filter.
Remember: custom made filters are not returnable.
size: 4" x 4" and a Maximum filter size: 25" x
35". We can build filters larger then 25" x
35" but they are considered a double size (please call us
for pricing at 1-888-844-5820). If a double sized filter
is required, you may consider putting two filters together to
achieve the size desired, i.e. 18" x 40" you would
need two 18" x 20" air filters.