A system for protecting an agricultural field from frost damage, comprising: one or more induced flow apparatuses, each comprising an induced flow fan that has a primary air flow inlet, a primary air flow outlet, a secondary flow inlet and a secondary flow outlet wherein said primary air flow induces a larger volume of secondary air flow； a primary air flow impeller, powered by a motor, and a duct arrayed to conduct the primary flow from the primary flow impeller to the induced flow fan. The induced flow apparatuses are disposed to induce the flow of warmer, upper-level, air into a lower level, displacing lower, cooler, air in an agricultural field.
