When your shopping for a quality window film many companies will use phrases like "total solar energy rejected"  or "UV rejection" that seem to add value or prove the performance of their products.  These numbers are important however they do not tell the whole story.  The best way to determine the total performance of any product is to actually "feel the difference."  That's where our heat demonstration box comes in.  By placing you hand under a heat lamp and feeling the difference that our films make you will know exactly how well our films perform before deciding which product best meets your needs.