Honeywell 11255 - Manual (Page 61)

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General
PrecisionCell II extended surface minipleat rigid fil-
ters are a nominal four inches deep. They are
designed for use in most commercial and industrial
HVAC systems where medium to high efficiency fil-
tration is required. They are available in average
efficiency ranges of 60-65%, 80-85% and 90-95%
per ASHRAE Standard 52.1 atmospheric dust spot
test methods.
PrecisionCell II filters are especially suitable for
variable air volume systems and are designed to
operate at face velocities up to 625 fpm. Two styles
are available: standard box style and an optional
headered (top and bottom) version that are manu-
factured with a header for use with existing side
access housings (see Optional Model).
PrecisionCell II filters are UL 900 Class 2 listed.
Optional Model
Optional headered version PrecisionCell II filters
are the same size and have the same functional
design as the standard model. The filter is built with
a metal-reinforced header on the top and bottom of
the filter near the air entering side. The header
allows the filter to fit over the standing flanges of the
primary filter channel in existing side access hous-
ings. Headered PrecisionCell II filters are furnished
with a 1/2” wide polyfoam gasket on their vertical
sides to provide a filter-to-filter seal.
In-Line Space-Saving Design
PrecisionCell II filters dramatically reduce in-line
space requirements when compared to 12” to 36”
deep filters. Their nominal 4” depth makes a con-
venient “fit” for most installations. High efficiency fil-
tration, that is often required for acceptable Indoor
Air Quality, may now be selected by the design
engineer without having to compromise space.
Installation Considerations
PrecisionCell II filters may be installed in Flanders
Type 9 Holding Frames and Surepleat Side Access
Housings or similar existing hardware. Type 9
Holding Frames are riveted together to form a bank
and may be installed for upstream or downstream
service. Smaller systems and systems with mini-
mum upstream access space are best served using
Surepleat Side Access Housings.
Physical Data
Frame: Double-wall, moisture-resistant beverage board
Media: Water-laid microfine fiberglass with a
water-repellent binder
Media Support: Adhesive-bead pleat separators
Face Grid: Horizontal and diagonal supports bonded to
the media pack
Operating Limits: 160° F and 100% RH
Important Features
• Available in nominal 65%, 85%, and 95%
ASHRAE efficiencies
• Space-saving 4” thickness for installation flexi-
bility
• Rugged moisture-resistant bonded frame and
unitized pack for rigidity
• Cartridge design is ideal for VAV systems or tur-
bulent flow conditions
• Lightweight and easy to store and handle
PrecisionCell II
Extended Surface Mini Pleat
ASHRAE 65%: 86655.04xxxx ASHRAE 85%: 88655.04xxxx
ASHRAE 95%: 89655.04xxxx
Flanders - Foremost in Air Filtration
Corporate Headquarters, St. Petersburg, FL
the filter and hvac store