Honeywell 11255 - Manual (Page 57)

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PrecisionCell HT
High Temperature Rigid Filters
ASHRAE 65% 86255.xxxxxxH ASHRAE 85% 88255.xxxxxx
ASHRAE 95% 89255.xxxxxxH
General
PrecisionCell HT filters are designed for high tem-
perature applications up to 900
o F. They feature the
same rugged construction as the standard
PrecisionCell. The HT version is manufactured of
specially selected components to meet high temper-
ature requirements.
They are ideal for paint drying ovens or any appli-
cation requiring high efficiency filtration at high tem-
peratures. PrecisionCell HT filters are offered in two
high temperature operating ranges; 750
o F and
900 o F and efficiency ranges of 65%, 85% and 95%
per ASHRAE Standard 52.1.
Construction
The enclosing frame is manufactured of aluminized
steel, which is designed not to be negatively affect-
ed by elevated temperatures.
The media pack is protected by air entering and air
leaving retainer screens. Grid strap bracing on the
air entering and leaving sides maintain the rigidity
and integrity of the PrecisionCell HT.
The media is designed for operation in high tem-
perature applications and manufactured from one
continuous sheet of wet-laid micro-fine fiberglass,
which provides the required tensile strength and
operating pressure drop for these stringent applica-
tions.
Physical Data
Frame: 24 ga. aluminized steel
Media: Microfine fiberglass
Separators: Hemmed-edge corrugated aluminum
Header Frame: 7/8” wide aluminized steel
Faceguards: Aluminized steel expanded
Cross Bracing: 1/2” “T” strap downstream and hori-
zontal strap upstream
Important Features
• Continuous duty up to 900
o
F
• Aluminized steel construction
• 65%, 85%, 95% efficiencies
• Faceguards and grid straps
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