Economizers are essential mechanical components used to improve HVAC system efficiency by regulating the balance of return air and outside air. They help meet ventilation standards, reduce mechanical cooling demands, and lower overall energy consumption. Depending on unit design and application requirements, economizers are available in several configurations.
Low Leak vs. Standard Leak Economizers
Low Leak Economizers
- Built to meet industry standards for minimal air leakage through closed dampers
- Designed with tighter tolerances and improved sealing
- Required in many code-driven applications to reduce unnecessary energy waste
Standard Leak Economizers
- Allow more leakage than low-leak units
- Do not meet the low-leak industry requirement
- Suitable for applications where code does not mandate low-leak performance
MicroMetl Economizer Types
ECD Series – Down Discharge Economizers
Designed for vertical/down-discharge HVAC units.
- Mounts inside the RTU, directly over the bottom return air opening
- Equipped with horizontal, gear-driven blades
- Typically supplied with gravity (barometric) relief dampers
- Available in both Low Leak and Standard Leak versions
ECH Series – Horizontal Discharge Economizers
Built specifically for horizontal return duct applications.
- Fits inside the HVAC unit
- Uses vertical blade orientation due to unit size and opening placement
- Connects directly to horizontal ductwork
- Available only as Standard Leak due to design constraints
ECE Series – External Mount Economizers
Intended for applications requiring external installation or duct-mounted integration.
- Mounts externally to the HVAC unit or into ductwork
- Contains separate damper assemblies located outside the RTU cabinet
- Available as Low Leak or Standard Leak
ECC Series – Convertible Economizers
Flexible design for systems requiring both vertical and horizontal options.
- Standard installation: vertical down-discharge
- Can be converted for horizontal applications using supplied adapter panels or optional conversion kits
- Includes a panel to block the vertical return opening during conversion
- Relief damper relocates to the horizontal duct
- Offered in both Low Leak and Standard Leak models
Summary
MicroMetl offers a full range of economizer solutions to match RTU design, airflow direction, code requirements, and installation constraints. Whether the application demands low-leak performance, external mounting, conversion flexibility, or standard configurations, MicroMetl provides engineered options to support efficient and compliant HVAC operation.
