Greenheck’s new instructional video ‘How to Change Blade Pitch on an AX Fan’ can now be viewed on Greenheck’s website. The video demonstrates how to easily adjust vane axial fan blade pitch angles to increase or decrease airflow for optimal fan performance. Greenheck’s series of ‘How To’ videos are designed to help contractors and facility managers handle common maintenance issues specific to HVAC equipment. To view the video, visit www.greenheck.com  and click on the Library link on the home page navigation bar. Then click on videos. Greenheck is a worldwide leader in manufacturing and distributing air movement and control equipment.