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 savings drop, comfort issues rise, and systems may fail to meet code. This is where Ultra Low Leak Economizers come in.
Why “Low Leak” Matters
Economizer dampers are engineered to keep two air streams—outside air and return air—separate when required. When dampers leak:
- Unwanted outdoor air enters during extreme temperatures
- Pre-conditioned indoor air is lost
- Free Cooling becomes less effective
- Humidity and temperature control are compromised
- Energy costs increase
This is especially critical during unoccupied hours. For example, when outside temperatures drop near zero, even small leakage through a damper can pull in enough frigid air to tax the HVAC system.
The Role of Title 24 and ASHRAE 90.1
MicroMetl’s Ultra Low Leak dampers are engineered to meet the stringent leakage limits out