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Air Handling Unit Design Basics:Air Handling Unit 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