Updated September 3, 2024
https://tinyurl.com/Duct-Diam-in-inches-formula
Ductulator (not ours, please check work with formula above): www.oceanhvac.com/ductulator/
You will either need to purchase a license or get a trial license to use this.
Get the a trial license here: https://kwikmodel.com/product/kwik-model-kestrel-trial/
Install/update instructions: https://kwikmodel.com/km3d-zip-file-installation/
Mac version: https://drive.google.com/file/d/1Ea0mOn3P5fKhhCeMCL-irWH1A_WJKDUO/view?usp=drive_link
KwikModel Eagle Version 1-2-255-18
Updated 1/23/2026
(-Note: If you haven’t done so since late 2021, be sure to download and run the newest version of the Kwik Model with EnergyGauge Loads installer from the section above)
(Note 2: some versions of KwikModel had one of the floor types (R19 over unconditioned) set to the incorrect R value, please check this value in the libraries tab in
You will either need to purchase a license or get a trial license to use this.
Get a trial version license here:https://kwikmodel.com/free-30-day-trial-version/
Install/update instructions: https://kwikmodel.com/km3d-zip-file-installation/
Test out our newest version before it officially launches. This installer includes the latest KwikModel Eagle and EnergyGauge loads versions, and should immediately launch KwikModel when you finish installing it rather than you having to look for it in your program files folder or desktop.
You will either need to purchase a license or get a trial license to use this.
Get a trial version license here:https://kwikmodel.com/free-30-day-trial-version/