Since the previous 22 years, Mitzvah has established a reputation as a highly focused, systems-driven engineering business that provides high performance energy-saving products. Mitzvah has its headquarters in Delhi-National Capital Region and operations over 11 countries. Best quality Commercial air curtains made by mitzvah. Improvement to the thermal conditions of the property and a reduction in energy losses in the conditioned spaces Air curtains offer 65% protection against air leakage from the outside.