This are made for heat absorption and generally function at a lower pressure. Coils made with3/8-inch diameter tubing are rated for 400 PSIG and 300°F maximum operating temperature. Coils made with1/2- or 5/8-inch diameter tubing are rated for 250 PSIG and a maximum operating temperature of 300°F. All evaporator coils are factory tested with Safety and quality assurance. These coils are generally used for spot cooling or as part of anair handling system.