Compute-A-Fan is a fast, accurate and easy-to-use fan-selection program. This tool gives point-and-click access to COOK's entire line of fans, blowers, gravity ventilators, energy recovery ventilators and laboratory exhaust systems. A comprehensive, cross-reference interface allows the user to select fans based upon the product specifications of any major manufacturer.

The tools menu also includes these proven timesavers: Fan Law Calculator, Duct Designer, Psychrometric Calculator, English-Metric Converter, Sound Converter, and Annual Energy Cost Estimator.

Cookware 9.5 is Windows 7 and 8 compatable

Compute-A-Fan "Full" software includes:

  • COOK Fan selector
  • Fan Law Calculator
  • Duct Designer
  • Psychrometric Calculator
  • English-Metric Converter
  • Sound Converter
  • Annual Energy Cost Estimator
  • Plus the option to install
    • Revit Tools, used with Compute-A-Fan
    • FanDrafter 2D
    • Engineering Cookbook PDF
    • Catalog PDFs
    • Manual PDFs

An automatic update will provide you with the latest versions of everything.

Note:The "Compute-A-Fan® v9.5 Full 901MB" includes all Cook downloads in one download. You may also download indiviual items below or request a DVD Rom. Login is required before accessing design tools.

Log in to download

(Stand-alone: You may also download Compute-A-Fan without the option to install Revit Tools used with Compute-A-Fan, FanDrafter 2D, the Engineering Cookbook, Catalogs or Manuals.)

Individual downloads

  • Compute-A-Fan
  • Revit Tools
  • FanDrafter
  • Fan Law Calculator /
    Duct Designer
  • Psychrometric
  • Engineering Cookbook App
    (for smartphone & ipad)

New features and functions in Compute-A-Fan v9.5:

New and Updated Products
  • LXULMO, LXUMMO, LTUMO, LEUMO - New upblast propeller roof fans with motor out of the airstream
  • LXULSC, LXUMSC, LTUSC - New upblast propeller roof fans UL Listed for smoke control applications
  • QMXLE, QMXHPLE - New mixed flow lab exhaust fans with high velocity outlet nozzle
  • CAC - New Air Circulator products
  • HMD - New direct fired heated makeup air unit
  • Gemini - Ceiling, Wall and Inline fans now have more efficient motors. GC 126 - 166 now Energy Star Certified
Updated Autodesk® Revit® Models and Add-In: This update includes new version 2014 models and add-in program. Version 2013 files are still present and you can choose your version at the time of exporting. New Sound Data
  • The CA, CF, CPS, CPS-A, CPA, CPA-A and CPV blowers now include AMCA Certified inlet and outlet sound data.
  • The SQNB and SQND now include AMCA Certified inlet and outlet sound data.
Other new features
  • 2.0 Service factor drives now available
  • Plume rise calculator with printout now available on the Tools Menu
Revit models & addin

Revit models for each fan that has been saved to a Compute-A-Fan job file can be exported by selecting the "Print/Export" menu and clicking "Export Revit Schedule From Job". This feature will export each model of fan that is contained in the job to a .ZIP file in the location of your choice. A database of schedule information (CFM, SP, RPM, Volts, Amps, etc) is also included for use with the Revit add-in described below.

FanDrafter also includes a Revit add-in that simplifies the placement and customization of the Cook models in your projects. This add-in links to the schedule information that is exported from Compute-A-Fan and automatically populates an extensive list of up to 70 parameters such as airflow, static pressure, fan RPM, horsepower, voltage, phase, etc when models are placed. The add-in even includes a customization module that allows you to match Cook parameter names to your company's standard parameters ensuring uniform equipment schedules. Once installed, detailed instructions on the operation of the add-in can be accessed by clicking the "?" icon in the upper-right corner of the add-in screen in Revit.You may also download the instructions. The add-in is compatible with Autodesk Revit MEP 2010 or later.

To install the add-in, you may check the box titled "Include Revit Add-in Setup Files" when exporting the Revit models. This option will include the installation program in the .ZIP file along with .rfa files and the schedule database. Simply extract the files from the .ZIP and double-click the file "LorenCookRevitApp.msi" to install the add-in.

Note: Compute-A-Fan includes Revit Add-in.
Revit Fan Drafter Instructions

Autodesk® Revit MEP® 2013

Autodesk® Revit® families are available for every model and configuration of LOREN COOK product. Each 3D parametric family is a full-scale representation with information on ducts, electrical connections, mounting holes and more. A revit add-in is included to automate the insertion of families.

Browse our online library of individual Revit® files

Login to get access to software

FanDrafter 2d drawing

FanDrafter® 2D v3.0

FanDrafter 2D is a collection of CAD drawing files (templates) of every LOREN COOK COMPANY product, drawn to scale in every size. Each drawing includes multiple views drawn full scale for a particular size. FanDrafter is compatible with AutoCAD Release 2000® and later, and all other programs that can import AutoCAD R2000® DWG format files.

Download the FanDrafter 2D as part of the Compute-A-Fan package or as a stand-alone software
View the FanDrafter ReadMe file



This handy, two-in-one design tool furnishes fast, accurate, and practical information. Fan Law Calculator displays CFM, RPM, static pressure, and horse power. Input any one measurement and all four are calculated. Duct Designer selects the proper duct size when capacity, velocity, and friction loss are entered.

Compute-A-Fan includes a computerized Fan Law Calculator and Duct Designer

To request a hard-copy of Fan Law Calculator/Duct Designer, contact your local COOK representative.

COOK's Psychrometric Analysis software tool allows the user to electronically generate and print a custom, detailed, psychrometric chart.  This program allows the user to enter state points and graph the process while calculating additional air properties.

Compute-A-Fan includes a basic Psychrometric calculator

Download Psychrometric Analysis Software to experience a more full-featured software

A printable psychrometric chart (in .pdf format) is also available for download. 
It is available in pdf form

 Apps for android or iphone

The Engineering Cookbook is a convenient pocket reference guide for mechanical designers. It provides access to frequently needed information, including:

  • Fan Basics
  • Motor and Drive Basics
  • System Design Guidelines
  • General Ventilation Design
  • Duct Design
  • Heating & Refrigeration
  • Formulas & Conversion Factors

This free 100 page guide is available in printed form from your local COOK representative or download the pdf.

Android & iPhone Applications

Engineering Cookbook is available as a free app from the Android Marketplace & Apple iTunes

Android app of Engineering Cookbook has been updated. Version 1.1 now has the ability to save to an SD card, if available.