Air-Curtain Angle Law and Legal Definition

According to 10 CFR 431.62 [Title 10 – Energy; Chapter II -- Department of Energy; Subchapter D -- Energy Conservation; Part 431 -- Energy Efficiency Program for Certain Commercial and Industrial Equipment; Subpart C -- Commercial Refrigerators, Freezers and Refrigerator-Freezers], the term air-curtain angle means:

“(1) For equipment without doors and without a discharge air grille or discharge air honeycomb, the angle between a vertical line extended down from the highest point on the manufacturer's recommended load limit line and the load limit line itself, when the equipment is viewed in cross-section; and

(2) For all other equipment without doors, the angle formed between a vertical line and the straight line drawn by connecting the point at the inside edge of the discharge air opening with the point at the inside edge of the return air opening, when the equipment is viewed in cross-section.”