Exhaust Fans New Video – How does a Heat Transfer Kit work? Posted on February 8, 2016March 1, 2016 by stuartm 08 Feb Our new video series features basic answers to frequently asked questions. This week we are taking a look at how a heat transfer system works and how easily it can be installed. View the full video below: stuartm New Semi Commercial Wall Fans – 2 Sizes available! How Does an Inline Fan Work?