Honeywell 11255 - Manual (Page 49)

49
General
Rigid-Air extended media surface rigid filters are
designed for use in most commercial or industrial
HVAC systems where medium to high efficiency fil-
tration is required.
They feature your selection of media backed with
expanded metal and pleated. The pleats are held in
place by rigid pleat separators, now available in
either plastic or metal styles. Rigid-Air is available
in two media types: lofted fiberglass and micro-fine
synthetic with average efficiency ranges of 50-55%,
60-65%, 80-85% and 90-95% per ASHRAE
Standard 52.1 test methods.
These filters are especially suitable for variable air
volume systems. Operating face velocity ranges
are from 0 to 375 fpm for 6” deep filters, and from 0
to 675 fpm for 12” deep filters. Two frame styles are
available: a single header model and a box type
without header. Rigid-Air filters are UL 900 Class 2
listed. Optional Class 1 listed are available with
metal inserts and fiberglass media.
Installation Considerations
Rigid-Air filters may be installed in Type 9 Holding
Frames, K-Trac Filter Framing Modules, Sureseal
Side Access Housings or in similar existing hard-
ware. Type 9 Holding Frames are riveted together
to form a bank and may be installed for upstream or
downstream service. K-Track Filter Framing
Modules are especially suitable for medium to large
built-up filter banks. Smaller systems and systems
with minimum upstream access space are best
served using Sureseal Side Access Housings.
The headered version should be selected for use
with the hardware listed above. If the filter is to be
installed so that it protrudes upstream of the Type 9
Holding Frame, the box style filter is required.
Physical Data
Frame: 24 ga. corrosion-resistant steel
Media: Lofted fiberglass or micro-fine synthetic
Media Supports: Expanded metal grid with metal or
plastic pleat separator
Face Grid: Horizontal and diagonal metal supports
Header: 13/16” wide 26 ga. corrosion-resistant steel
Operating Limits: 180 ° F 100% RH %
Actual Header or Box Filter Face Size: Nominal size less
5/8” (e.g., a nominal 24” x 24” filter is actually 23 3/8”
x 23 3/8”)
Actual Depth: 5-7/8” or 11-1/2”
Rigid-Air
Fiberglass or Synthetic Media Rigid Filter
Synthetic Media PRP**Sxxxxx, PRP**SxxxxM
Glass Media: PRP**Gxxxx, PRP**GxxxxM
(** insert 55, 65, 85 or 95 for percent ASHRAE efficiency
Important Features
• Rugged corrosion-resistant steel casing mini-
mizes damage during shipping and handling.
• Lofted fiberglass micro-fine or synthetic media is
held in position by upstream and downstream
plastic or (NEW!) metal pleat supports.
• Units are available with or without header.
• Filters are completely rigid.
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