Honeywell F27f1032, F27f1040, F27f21040, F27f1027, F27 Product Data
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F27F
Return Grille Media Air Filter
PRODUCT DATA
FEATURES
•High efficiency filter media removes particles as small as 1.0 micron.
•Efficiency and arrestance ratings based on the American Society of Heating, Refrigeration and Air Conditioning Engineers Standard 52.1-1992.
•Applicable to all gas, oil, and electric forced warm air furnaces and to compressor cooling up to 5 tons. Can be used with heat pumps only if the filter is changed regularly to prevent excessive pressure drop. Not recommended for applications where pressure drop may be critical.
•Requires no electrical connections.
•Requires no maintenance except periodic media filter replacement.
•Media filter is easily replaced by homeowner.
•Models available with louvered door/grille or egg crate door/grille.
•Egg crate door/grille models can be mounted vertically or horizontally.
•Allows easy upgrade to F52 Electronic Air Cleaner.
APPLICATION
The F27F Return Grille Media Air Filter is a media air cleaner that mounts in the main return air duct of a central forced air heating, cooling, or ventilation system. The F27F removes airborne particles such as dust, soot, pollen, and some cooking smoke from the air circulated through its filter. The F27F design allows easy upgrade to the F52F Electronic Air Cleaner when desired.
® U.S. Registered Trademark
Copyright © 1996 Honeywell Inc. • All Rights Reserved
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Contents |
Application ........................................................................... |
1 |
Features .............................................................................. |
1 |
Specifications ...................................................................... |
2 |
Ordering Information ........................................................... |
2 |
Planning the Installation ...................................................... |
3 |
Installation ........................................................................... |
5 |
Checkout ............................................................................. |
6 |
Maintenance ........................................................................ |
6 |
Future Options .................................................................... |
6 |
Replacement Parts .............................................................. |
6 |
68-0159-1
F27F RETURN GRILLE MEDIA AIR FILTER
SPECIFICATIONS
IMPORTANT
The specifications given in this publication do not include normal manufacturing tolerances. Therefore, this unit may not exactly match the listed specifications. Also, this product is tested and calibrated under closely controlled conditions, and some minor differences in performance can be expected if those conditions are changed.
Model:
F27F Return Grille Media Air Filter — includes cabinet, access door and pleated media filter. Models available with louvered door/grille or egg crate door/grille.
Upgrade kits are available to change a louvered door/grille unit to an egg crate door/grille unit (see Table 3 in the Replacement Parts section for part numbers).
Application:
Use with gas, oil, and electric forced warm air furnaces and with compressor cooling. Can be used with heat pumps if
filter is changed regularly to prevent excessive pressure drop. Not recommended for applications where pressure drop may be critical.
Arrestance Efficiency:
Efficiency ratings are based on National Bureau of Standards Dust Spot Method using atmospheric dust and American Society of Heating, Refrigerating and AirConditioning Engineers Standard 52.1-1992.
Initial Efficiency: 10 percent (staining dirt removal). Average Efficiency: 18 percent (staining dirt removal). Average Arrestance: 90 percent (bulk dirt removal).
The F27F removes particles as small as one micron. See Fig. 1 for size ranges of common household particles.
Filter Media:
Nonwoven, reinforced cotton and synthetic fabric, pleated to increase media area. See Table 1.
Capacity and Pressure Drop:
See Table 1.
Temperature Rating:
-40°F to +125°F (-40°C to +52°C).
Table 1. Capacity, Pressure Drop and Area of F27F Filter Media.
Nominal Size |
Filter Depth |
Media Area |
Maximum Capacity |
Initial Pressure Drop |
in in. (mm) |
(in.) |
(sq ft.) |
(cfm)a |
(in. wc)b |
12-1/2 x 20 (318 x 508) |
4.25 |
13.6 |
875 |
0.27 |
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16 x 25 (406 x 635) |
4.25 |
23.1 |
1400 |
0.27 |
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21-1/2 x 27-1/2 (546 x 698) |
4.25 |
33.9 |
2000 |
0.27 |
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aMaximum capacity based on 500 fpm face velocity.
bWhen first installed. Pressure drop increases as filter becomes loaded. Replace filter when pressure drop reaches 0.5 in. wc (0.1 kPa).
Dimensions: |
Upgrade Path: |
See Fig. 2. |
The 12-1/2 x 20 in. and 21-1/2 x 27 in. F27F cabinets have |
Grille Type: |
the same dimensions as models of the F52F Electronic Air |
Cleaner. Upgrade requires removing the F27F and installing |
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Louvered or egg crate. |
the F52F in its place. |
Underwriters Laboratories, Inc.: |
Accessory: |
Listed to U.L. 900, Class 2. |
S830A Clogged Filter Indicator (duct mounted). |
ORDERING INFORMATION
When purchasing replacement and modernization products from your Tradeline® wholesaler or your distributor, refer to the TRADELINE® Catalog or price sheets for complete ordering number, or specify:
1.Order number.
2.Type of door/grille—louvered or egg crate.
3.Accessories, if desired.
If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:
1.Your local Honeywell Home and Building Control Sales Office (check white pages of phone directory).
2.Home and Building Control Customer Relations Honeywell, 1885 Douglas Drive North Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
68-0159—1 |
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F27F RETURN GRILLE MEDIA AIR FILTER
Replacement Media:
Replace media filter annually or more often if reduced airflow results in lower heating/cooling equipment performance. Replacement part numbers are shown in Table 3, Replacement Parts section.
Mounting:
Recesses into duct opening on wall or ceiling. Not intended for floor installations.
F27 MEDIA AIR FILTER
EFFECTIVE RANGE
F52 ELECTRONIC AIR CLEANER EFFECTIVE RANGE
TOBACCO SMOKE
ATMOSPHERIC DUST
SMOG
CLAY |
SILT |
FINE SAND |
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PLANT |
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SPORES |
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VIRUSES |
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BACTERIA |
POLLENS |
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0.001 |
0.01 |
0.1 |
0.5 |
1.0 |
10.0 |
100.0 |
1000.0 |
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PARTICLE DIAMETER IN MICRONS |
M9884 |
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Fig. 1. Size ranges of common airborne particles.
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UNIT |
DIMENSION |
DIMENSION |
DIMENSION |
DIMENSION |
DIMENSION |
(INCHES) |
A |
B |
C |
D |
E |
12-1/2 X 20 |
15-11/16 |
28 |
13-1/16 |
25-15/16 |
6-15/16 |
21-1/2 X 27-1/2 |
31 |
24 |
29-1/16 |
22 |
6-15/16 |
16 X 25 |
26-5/8 |
20 |
25-1/16 |
17-3/4 |
5-1/2 |
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M9890A |
Fig. 2. Installation dimensions in in. (mm) .
PLANNING THE INSTALLATION
The F27F is installed in place of the main return grille so all the air circulated by the system passes through the air filter. For most efficient air cleaning, airflow must be spread evenly across the face of the media. If the duct is a different size than the media air filter grille, transitions may be needed. Gradual transitions reduce air turbulence and increase efficiency. The transition should be 20 degrees (about 4 in. per running ft [100 mm per 300 linear mm]) or less on each side of a transition fitting, Fig. 3. If the duct turns sharply just after the air filter, turning vanes may be necessary, Fig. 4.
The F27F can be installed in either a wall or ceiling, but not in the floor. See Fig. 5 through 7 for typical installations.
In a wall installation, mount the unit with the door hinge on the bottom so the smaller models fit between the studs. One or more studs may have to be cut and framed to make space for larger units. The return duct should end at, or slightly behind, the finished wall surface. Do not use a standard register flange, or the door may not fit tightly against the wall.
Do not install the unit in the wall with the hinge on the top.
The front door of the grille is hinged to provide access to the media filter. See Fig. 8. The F27 filter must be installed with the airflow arrow pointing away from the grille. The filter is held in place by a bracket and spring clip.
20 DEGREE EXPANSION PER SIDE PER FITTING (4 IN. PER RUNNING FOOT [100 MM PER 300 LINEAR MM]) 
RETURN AIR
DUCT AIR
FLOW
TRANSITION FITTING 
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RETURN GRILLE MEDIA |
M9888 |
AIR FILTER CABINET |
Fig. 3. Change duct size gradually to prevent turbulence.
3 |
68-0159—1 |
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