Window Product Comparison  
               
  Option Controls Sunlight Reduce Heat Transfer Stop Infiltration Control Humidity Comments  
  Blinds, Shutters, Shades, Curtains Yes No No No Makes more shade but reduces natural light.  No real payback.  
  Window film Yes No No No Darker tints make people feel cooler, but can attract heat.  No payback.  Usually voids window warranty.  
  Solar Screens Yes No No No Not much benefit for cost, limited life span.  Limited payback.  
  Double Pane & Triple Pane Glass No Yes Yes Yes These are bad insulators.  Minimal payback (average cost $50/sq ft.)  
  In'Flector Solar Window Insulator Yes Yes Yes Yes Increases window efficiency, enhances comfort, with less than 4 year payback, long life span, & UV Protection.