Linear Versus Fixed Capacity DOAS


Linear Capacity (LC) is a patent-pending innovative ventilation technology that simultaneously delivers breakthrough performance, energy efficiency, and indoor air quality.

The LC utilizes a geometrically varying evaporator exposure device (Active Coil Exposure) to maintain designed leaving dew point throughout the entire operating range, with an optimized linear performance from 100% down to 20% of ventilation load with an application range from 500-7,500 CFM of outdoor air. The LC achieves 53% energy savings versus conventional DOAS, independently verified by Florida Solar Energy Center (F.S.E.C.).

Energy Savings Vs. Fixed Capacity DOAS

Featuring Active Coil Exposure, the LC unit is equipped with five independent and separated evaporator coils. Utilizing a laser positioning system which allows only the active evaporator coils to be exposed to the air flow path, A.C.E. adjusts the coil surface based on the airflow demand. Ventilation can then be scheduled to meet demand in different zones based on occupancy levels, from 100 to 20% of capacity, throughout the ambient operating range.

If there is a period of time when dehumidification is not required, Linear Capacity provides an option to perform as a constant volume unit. The LC unit is able to provide energy savings due to the variable refrigerant flow, variable airflow, variable condenser air, and refrigerant management, greatly outperforming conventionally fixed capacity DOAS units.