Active airflow inhibiting apparatus

An active airflow inhibiting apparatus for an entranceway of a building comprising:

• a structure configured to be positioned adjacent the entranceway and defining a passage therethrough for accessing the entranceway;
• wherein the structure defines at least one plenum chamber and first and second outlet slots fluidically coupled to the at least one plenum chamber;
• a fan fluidically connected to the at least one plenum chamber for supplying an airflow to the at least one plenum chamber in order to selectively form a jet of air from the first outlet slot and not the second outlet slot in a first mode of operation and from the second outlet slot and not the first outlet slot in a second mode of operation;
• wherein the first and second outlet slots are configured so that the respective jets of air are each directed towards a center of the structure, with the jet of air from the first outlet slot being directed away from the entranceway and the jet of air from the second outlet slot being directed towards the entranceway.