What is a variable frequency drive? Heating, ventilation, and air conditioning systems' air supply used to be constant volume into a space. Now a variable air volume control is being used to provide ...

The station already has electricity and wall frames and now they’re waiting to install the HVAC system and plumbing. “Once we get all that done, we’ll be moving pretty good,” said Houston.

Reddit user [InThePartsBin] found some VFDs (Vacuum Fluorescent Displays) on an old PCB on eBay. The Russian boards date from 1987 and have a bunch of through-hole resistors, transistors and a ...

He’s ready to start making changes to the fire station, and after Wednesday’s Kanawha County Commission meeting, the VFD is ...

Complimentary Guide on HVAC Efficiency for Facilities Managers: How to Improve Air Filtration & Indoor Air Quality The ...