by Micrometl | Jan 15, 2026 | Mixing Boxes & Econos
Economizers are designed to improve HVAC efficiency by mixing outside air with return air—reducing compressor use whenever outdoor conditions allow. But the performance of any economizer depends heavily on the integrity of its dampers. When dampers leak, energy...
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 | Mixing Boxes & Econos
A common question in ventilation design is: “How does a building exhaust air when fresh outdoor air is being introduced?” One simple, passive solution is a Barometric Relief Damper, also known as a gravity relief damper. What Is Barometric Relief? A barometric relief...
by Micrometl | Jan 15, 2026 | General
The MicroMetl’s Sales Department too often receives requests for Hold Down Brackets to meet wind code requirements. The common misconception; the brackets alone installed on a standard rooftop curb will fulfill wind code requirements. Perhaps the misconception...
by Micrometl | Jan 15, 2026 | Roof Curbs
Keeping people out of your building isn’t always as simple as locking the doors. When traditional break-in attempts are too risky or unsuccessful, intruders often look for unconventional access points—one of the most overlooked being your HVAC system. Whether it’s a...
