Integrated venturi heating elements for air curtains

摘要

An air curtain resistant heating system including multiple independent heating coils integrated on blower housing. The multiple heating coils defining a pre-inflow venturi air pattern for increased heat transfer before fan cage internal flow vortex dependent on housing cage opposed openings. Coil orientation placement assures limited impact to effect blower pressure and therefore minimizes loss of air performance parameters while heating air flow in a pre-inflow venturi air pattern. Multiple phase electrical supply for multiple paired heating coils positioned in corresponding multiple blower fan units in an air curtain assembly.