Model ECV-40 is the latest addition to Greenheck’s energy core ventilator line. ECV-40’s design features a dual-fan arrangement consisting of direct drive mixed-flow plenum fans with variable frequency drives (VFDs), replacing the forward-curved fan typically found in energy core ventilators. The mixed-flow fan, a hybrid between an axial propeller and centrifugal fan, reduces brake horsepower requirements by up to 50 percent. The VFDs facilitate ease of balancing at startup. Sound power levels are reduced and no belts make maintenance easy. ECV-40 is available with AHRI Certified fiber or polymer membrane cores with an airflow capacity up to 5,000 cfm. Optimized to ensure the best unit performance in the smallest footprint available, ECV-40 features double wall construction and optional hinged access with additional options for frost/economizer and standalone microprocessor controls.