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 9.9 is Windows 7, 8, and 10 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: "Compute-A-Fan v9.9" includes all Cook downloads in one download. You may also download individual items below. Login is required before accessing design tools.

Log in to download

Individual Downloads

  • Compute-A-Fan
  • Revit Tools
  • FanDrafter
  • Psychrometric
  • Apps for Smartphones
    and Tablets 

New features and functions in Compute-A-Fan v9.7

New and Updated Products


QMX lab fans reconfigured with fabricated aluminum nozzles. Greatly expands the QMX Vari-Plume offering and allows fine-tuning fan selection to the needs of the installation
  • 162 potential fan/nozzle combinations
  • Better horsepower performance
  • Less expensive custom color option
  • Higher temperature options – Aluminum options up to 300F.

Vari-Flow Pressure Control

Compact, economical, easy-to-use pressure control compatible with all Vari-Flow EC Motors
  • Maintains differential pressure across high and low ports
  • Configurable to monitor and control duct static, room static, space differential, and duct velocity pressure
  • Easy-to-install and simple setup through pushbutton menu selection
  • Three pressure ranges – 0-1”, 0-2” and 0-5” wg
  • 4.25” x 3.25” x 2.125”
  • NEMA 1 Enclosure

2800 Max RPM EC Motors

Extending the selection options of the Vari-Flow EC motors
  • Available up to 1 HP
  • Same voltage/phase availability, functionality and ease-of-control as the Vari-Flow offering
  • Same functionality
  • Same ease-of control as the Vari-Flow offering

Updated Autodesk® Revit® Models and Add-In
  • This update includes new version 2016 models and add-in program. Version 2015 files are still present and you can choose your version at the time of exporting.
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 "LorenCookRevitApp2015.exe" to install the add-in.

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

Autodesk® Revit MEP® 2016

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

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



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


Smartphones and tablets have become the new toolboxes. Make sure you have the right tools in your toolbox.


CookTools is a new app providing a suite of simple-yet-powerful tools for the HVAC engineer, designer and contractor.

Included in CookTools:

  • Fan Law Calculator – Calculate new system operating conditions quickly and accurately with just a few pieces of data.
  • Sound Calculator – Calculates sound power, sound pressure and Noise Criteria from input of octave band sound data.
  • Duct Designer – Quickly calculate rectangular and round duct sizes that meet your system needs
  • Area Calculator – Computes section properties of round and rectangular shapes sections.

From the main menu you also have access to all the Loren Cook Company social media channels and the mobile website.

Engineering Cookbook

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

  • Fan Basics
  • System Design
  • Duct Design
  • Motors & Drives
  • Heating & Refrigeration
  • Formulas & Conversion Factors

This free 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 on Google Play & Apple App Store

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

  • Get it on Google Play
  • Cook QR Google Play
  • Google Play and the Google Play logo are trademarks of Google Inc.

  • Get it on the App Store
  • Cook QR Apple App Store
  • Apple and the Apple logo are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc.