Berner International Corp. has introduced a patented Venturi-style heater design, which the company says will offer a more aerodynamic, electric heated air curtain with improved air performance efficiency by up 40% The VTH electric heater combines a hemispherical heating element array with an innovative mounting strategy at the blower inlet. The patented design uses the Venturi effect to draw air through the heating element via the blower inlet before it enters the discharge airstream. The discharge airstream velocity remains unobstructed in a near 100% efficient heat transfer, full laminar pattern for an optimum aerodynamic performance. Company officials said that this creates a near perfect environment-separating air seal across any open doorway while providing auxiliary heat, as needed.
Berner International Corp. has added single-length 7-, 8-, 9-, and 10-ft long models to its ANSI/NSF 37-certified E-Zone and K-Zone (EZN and KZN Series) air curtains designed for energy savings and flying insect control. The EZN and KZN Series are now available in nine widths ranging from 3 ft to 10 ft, which the company says eliminates the inconvenience and mismatches of combining smaller sizes to create a longer air curtain.
Retrieving every last bit of performance from the system while stopping short of the surge line is no small feat. Dig into sizing, tower selection, chilled water loads and stability, and condenser water management to leave no efficiency stone unturned. Read more in April issue