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8/11/2019 AHU Design Basics
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Air Handling Unit Design Basics:Air Handling Unit Design Basics:
AHU Design BasicsAHU Design Basics
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Opening Sizing and LocationsOpening Sizing and Locations
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Opening Sizing and LocationsOpening Sizing and Locations
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Centrifugal Fan (Housed) ApplicationsCentrifugal Fan (Housed) Applications
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Centrifugal Fan ApplicationCentrifugal Fan Application
DWDI
Fan
Min. Inside Width
A Min.
PLAN VIEWA= Wheel Diameter
A Min.
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Centrifugal Fan ApplicationCentrifugal Fan Application
SWSI
Fan
Min. Inside Width
A Min.
PLAN VIEWA= Wheel Diameter
8 Min.
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Centrifugal Fan (Housed) ApplicationsCentrifugal Fan (Housed) Applications
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Centrifugal Fan ApplicationCentrifugal Fan Application
DWDIFan
Min. Inside Width
A Min.
PLAN VIEWA= Wheel Diameter.
DWDIFan
A Min.1.5x A Min.
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Centrifugal Fan ApplicationCentrifugal Fan Application
ELEVATION Centrifugal Fans*If required 15 Normal may be reduced to 8 by modifying thevibration base
4 Min. 3 Min. 3 Min.
15 * 15 * 15 *
Insideheight
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PlenumPlenum--Type (UnType (Un--Housed) FanHoused) Fan
ApplicationsApplications
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PlenumPlenum--Type (UnType (Un--Housed) FanHoused) Fan
ApplicationsApplications
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General Coil ApplicationsGeneral Coil Applications
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General Coil ApplicationsGeneral Coil Applications
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Coil ApplicationsCoil Applications
Cooling CoilsCooling Coils
F.L.+3
Inside Width
2 Min. 10
PLAN VIEW(Coil Tube Length +15)
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Coil ApplicationCoil ApplicationCooling CoilsCooling Coils
Min. Inside Height
ELEVATION
3
5 from top of perimeter channel
2-1/2
FH+3
FH+3
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General Coil ApplicationsGeneral Coil Applications
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General Coil ApplicationsGeneral Coil Applications
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Coil ApplicationsCoil Applications
IFB/VIFB CoilIFB/VIFB Coil
Coil Length
Inside Width
2 Min.
2 Min.
PLAN VIEW
11
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Coil ApplicationsCoil Applications
Steam IFB/VIFB CoilSteam IFB/VIFB Coil
ELEVATION
Min.
InsideHeight.
18 Min.
6 Min.
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Coil ApplicationsCoil Applications
Water IFB/VIFB CoilWater IFB/VIFB Coil
ELEVATION
Min.
InsideHeight.
8 Min.
6 Min.
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General Filter ApplicationsGeneral Filter Applications
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General Filter ApplicationsGeneral Filter Applications
Carbon or gasCarbon or gas--phase filter banks requirephase filter banks require
36 minimum clear access space on36 minimum clear access space on
service side of filters.service side of filters. When applying gasWhen applying gas--phase filters in unitsphase filters in units
with steam heating; recommendwith steam heating; recommendmaintaining high temperature limit
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Service Area ConsiderationsService Area Considerations
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Service Area ConsiderationsService Area Considerations
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Air Handling Unit Design Basics:Air Handling Unit Design Basics:
AHU Design BasicsAHU Design Basics
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