by Micrometl | Jan 15, 2026 | General
Variable Frequency Drive (VFD)… What Is It, And Why Use It In HVAC? A Variable Frequency Drive (VFD) controls the speed of a motor, specifically a three phase motor. To better understand a VFD, let’s examine the motors they control. Most commercial HVAC...
by Micrometl | Jan 15, 2026 | General
HVAC Fan Types — Is A Fan Just A Fan? – Not at all. It’s important to understand basic fan types to properly understand how to choose the best, most cost effective type for the job. Know your fan types. All fans are designed for the sole purpose of moving...
by Micrometl | Jan 15, 2026 | General
What Is A Multiple Speed HVAC Fan… Why Is It Needed? Multiple Speed HVAC fans… No, not like the above graphic of a condenser unit in desperate need to remove heat from the coils… I’m talking about an HVAC fan used to supply air into a building....
by Micrometl | Jan 15, 2026 | Electrical
In the HVAC industry, equipment is commonly built to operate on either single phase or three phase electrical power. Technicians spec these options every day, but understanding the differences—and the advantages of each—helps ensure the correct equipment and...
by Micrometl | Jan 15, 2026 | Power Exhaust
A Power Exhaust is an active, motorized fan system designed to remove return air from the building at controlled volumes. Unlike passive barometric dampers, Power Exhaust systems: Actively move air out of the building Respond to changes in outside air intake Prevent...
