Excel are prerequisites for using this spreadsheet.

Microsoft Excel version 97 is the minimum requirement to use the spreadsheet but MicrosoftExcel version 2000 or greater is recommended to utilize the full features of the spreadsheet.

We strongly suggest that you print out and read the instructions on using this electronic spreadsheet

This spreadsheet can be downloaded from the ACCA System Design wePlease visit the website often to check for updates to the spreadsheet. The most recent versionnumber is listed on Notes tab.

Welcome to the electronic spreadsheet version for the ACCAManual D, 3rd Edition (D3) -- Residential Duct Systems, 2008

A thorough understanding of the D3 manual as well as a working knowledge of Microsoft

This spreadsheet uses revised versions of the printed D3 worksheets.

Use the printed D3 manual for guidance to enter information into the Effective Length,Friction Rate and Duct Sizing tabs.

that are contained in the following Help tab.

ACCA System Design

ACCA Manual D, 3rd Edition

*** Refer to the Notes Tab to verify the latest revision ***

Help Section Refer to Manual D Residential Duct Systems, Third Edition Version 1.xxStep 1:

Enter the linear feet of trunk and runout ducts in the length sections for the supply ducts.

Repeat the steps above for the return ducts.

Step 2:Next enter "Component Pressure Losses" for all components and accesories external of the fan unit.

Step 2:There is a maximum of 14 supply runs per unit.For larger rooms divide the BTUH by the number of runs required for proper distribution of airflow.The program will automatically select the duct size for round metal ductwork.For rectangular metal ductwork enter the height and the program will automatically select the duct size.If Flex Duct is used refer to the Equivilent Flex column to select the correct duct size.Under the supply truck section, select the associated supply runs for this supply trunk section and the CFM willautomatically calculate.The program will automatically select the duct size for round metal ductwork.For rectangular metal ductwork enter the height and the program will automatically select the duct size.If Flex Duct is used refer to the Equivilent Flex column to select the correct duct size.

Repeat the steps above for the return ducts.

Go to the Effective Length Tab and enter up to 4 supply runs to determine the longest equivilent run in the system.

Click on the Group Code and find the equivilent feet for all fittings used in the selected supply runs.The program will automatically select the "Total Equivilent Feet" to be used in the Friction Rate Tab.

Go to the Friction Rate Tab and enter the "External Static Pressure" and "CFM" for the selected equipment.

The program will automatically calculate the "Design Friction Rate" value to be used for Duct Sizing.

Go to the Duct Sizing 1 Tab and enter the heating and cooling BTUH for each supply run.

If more than four (4) supply trunk sections are required select the Duct Sizing 2 Tab.

Air Conditioning Contractors of America, Manual D, Third Edirtion

Effective Length WorksheetElement Supply Run ID Number

Straight Run Length Length Length LengthTrunk LengthTrunk LengthTrunk LengthRunout Length

FittingsGroup Effective Group Effective Group Effective Group EffectiveLetter Length Letter Length Letter Length Letter Length

OtherOtherOtherTotal Length 0 0 0 0Design TEL 0Element Return Run ID Number

Straight Run Length Length Length LengthTrunk LengthTrunk LengthTrunk LengthRunout Length

FittingsGroup Effective Group Effective Group Effective Group EffectiveLetter Length Letter Length Letter Length Letter Length

OtherOtherTotal Length 0 0 0 0Design TEL 0

Group 1 ◄Group 2 ◄Group 3 ◄Group 4 ◄Group 8 ◄Group 9 ◄Group 11 ◄Group 12 ◄

Group 5 ◄Group 6 ◄Group 7 ◄Group 8 ◄Group 10 ◄Group 11 ◄Group 12 ◄

Air Conditioning Contractors of America, Manual D, Third Edition

Friction Rate WorksheetStep 1) Manufacturer's Blower Data

External static pressure (ESP) IWCCFM

Step 2) Component Pressure Losses (CPL)Direct expansion refrigerant coilElectric resistance heating coilHot water coilheat exchangerLow efficiency filterHigh or mid-efficiency filterElectronic filterHumidfierSupply outletReturn grille

UV lights or other deviceTotal component losses (CPL) Error IWC

Step 3) Available Static Pressure (ASP) #VALUE! IWCStep 4) Total Effective Length (TEL) 0 FeetStep 5) Friction Rate Design Value (FR) #VALUE! IWC/100

Balancing damper ◄

Air Conditioning Contractors of America, Manual D, Third Edition

Duct Sizing Worksheet 1Supply-side Runouts Equivilent Rect. Duct Equivilent

ID Room ID H-Btuh C-Btuh Dsn Cfm Round Size Velocity Final Size Height Width FlexSR-1 #DIV/0! #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!SR-2 #DIV/0! #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!SR-3 #DIV/0! #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!SR-4 #DIV/0! #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!SR-5 #DIV/0! #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!SR-6 #DIV/0! #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!SR-7 #DIV/0! #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!SR-8 #DIV/0! #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!SR-9 #DIV/0! #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!SR-10 #DIV/0! #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!SR-11 #DIV/0! #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!SR-12 #DIV/0! #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!SR-13 #DIV/0! #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!SR-14 #DIV/0! #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!

0 0 #DIV/0!Supply-side Trunks Equivilent Rect. Duct Equivilent

ID Associated Supply RunsDsn Cfm Round Size Velocity Final Size Height Width Flex

1 2 3 4 5 6 7 8 9 10 11 12 13 14ST-1 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!ST-2 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!ST-3 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!ST-4 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!

Return-side Runouts Equivilent Rect. Duct EquivilentID Associated Supply Runs Dsn Cfm Round Size Velocity Final Size Height Width Flex

RR-1 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RR-2 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RR-3 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RR-4 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RR-5 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RR-6 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RR-7 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RR-8 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RR-9 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RR-10 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RR-11 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RR-12 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RR-13 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RR-14 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!Return-side Trunks Equivilent Rect. Duct Equivilent

ID Associated Supply Runs Dsn Cfm Round Size Velocity Final Size Height Width FlexRT-1 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RT-2 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RT-3 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!RT-4 0 #VALUE! #VALUE! #VALUE! 8 #VALUE! #VALUE!

Duct Sizing Worksheet 2Supply-side Runouts

ID Room ID H-Btuh C-Btuh Dsn Cfm Round Size Velocity Final SizeSR-1 0 0 0 #DIV/0! #VALUE! #VALUE! #VALUE!SR-2 0 0 0 #DIV/0! #VALUE! #VALUE! #VALUE!SR-3 0 0 0 #DIV/0! #VALUE! #VALUE! #VALUE!SR-4 0 0 0 #DIV/0! #VALUE! #VALUE! #VALUE!SR-5 0 0 0 #DIV/0! #VALUE! #VALUE! #VALUE!SR-6 0 0 0 #DIV/0! #VALUE! #VALUE! #VALUE!SR-7 0 0 0 #DIV/0! #VALUE! #VALUE! #VALUE!SR-8 0 0 0 #DIV/0! #VALUE! #VALUE! #VALUE!SR-9 0 0 0 #DIV/0! #VALUE! #VALUE! #VALUE!

SR-10 0 0 0 #DIV/0! #VALUE! #VALUE! #VALUE!SR-11 0 0 0 #DIV/0! #VALUE! #VALUE! #VALUE!SR-12 0 0 0 #DIV/0! #VALUE! #VALUE! #VALUE!SR-13 0 0 0 #DIV/0! #VALUE! #VALUE! #VALUE!SR-14 0 0 0 #DIV/0! #VALUE! #VALUE! #VALUE!

0 0 #DIV/0!Supply-side Trunks

ID Associated Supply RunsDsn Cfm Round Size Velocity Final Size

1 2 3 4 5 6 7 8 9 10 11 12 13 14ST-5 0 #VALUE! #VALUE! #VALUE!ST-6 0 #VALUE! #VALUE! #VALUE!ST-7 0 #VALUE! #VALUE! #VALUE!ST-8 0 #VALUE! #VALUE! #VALUE!

Return-side RunoutsID Associated Supply Runs Dsn Cfm Round Size Velocity Final Size

RR-1 0 #VALUE! #VALUE! #VALUE!RR-2 0 #VALUE! #VALUE! #VALUE!RR-3 0 #VALUE! #VALUE! #VALUE!RR-4 0 #VALUE! #VALUE! #VALUE!RR-5 0 #VALUE! #VALUE! #VALUE!RR-6 0 #VALUE! #VALUE! #VALUE!RR-7 0 #VALUE! #VALUE! #VALUE!RR-8 0 #VALUE! #VALUE! #VALUE!RR-9 0 #VALUE! #VALUE! #VALUE!

RR-10 0 #VALUE! #VALUE! #VALUE!RR-11 0 #VALUE! #VALUE! #VALUE!RR-12 0 #VALUE! #VALUE! #VALUE!RR-13 0 #VALUE! #VALUE! #VALUE!RR-14 0 #VALUE! #VALUE! #VALUE!Return-side Trunks

ID Associated Supply Runs Dsn Cfm Round Size Velocity Final SizeRT-5 0 #VALUE! #VALUE! #VALUE!RT-6 0 #VALUE! #VALUE! #VALUE!RT-7 0 #VALUE! #VALUE! #VALUE!RT-8 0 #VALUE! #VALUE! #VALUE!

Duct Sizing Worksheet 2Equivilent Rect. Duct Equivilent

Height Width Flex8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!

Equivilent Rect. Duct Equivilent

Height Width Flex

8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!

Equivilent Rect. Duct EquivilentHeight Width Flex

8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!

Equivilent Rect. Duct EquivilentHeight Width Flex

8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!8 #VALUE! #VALUE!

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Release Notes:

Version MD3 1.00 01SEP09 Initial Release