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1.0 General
1.1 Medium efficiency filters shall be Pre Pleat 40
extended surface pleated filters as manufactured
by Flanders..
1.2 Filter sizes and capacities shall be as scheduled
on the drawings.
1.3 Filters shall be UL 900 Class 1 or 2 listed.
2.0 Filter Construction
2.1 Filters shall be constructed of reinforced, non-
woven cotton/synthetic blend media laminated to
an expanded metal grid on the air leaving side
and formed into v-configuration pleats.
2.2 Frame shall be moisture-resistant board with diag-
onal and horizontal support members on the
upstream and downstream sides, and shall have
locking corners.
3.0 Performance
3.1 Initial and final resistances shall not exceed the
scheduled values.
3.2 Media area must equal or exceed that of the spec-
ified filter.
3.3 The average atmospheric dust spot efficiency
shall be 25-30% as determined by ASHRAE
Standard 52.1 test methods.
3.4 The manufacturer shall guarantee performance as
stated in the literature within tolerances as out-
lined in Section 7.4 of ARI Standard 850.
Guide Specifications
The Pre Pleat Series of Pleated Air filters
62R high efficiency pleated air
filters contain an electrostatically
charged filtration media which
has a higher dust holding capac-
ity.
Pre Pleat HV air filters are
designed to operate in
high velocity and turbulent
air applications where
standard pleated filters
tend to fail.
Pre Pleat Class 1 air filters are
designed for applications
where a UL Class 1 fire rated
filter is required and metal
frames are unsuitable.
Pre Pleat HT air filters are
designed for applications
where the temperatures
reach up to 400ºF.
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