WER certificates(Window Energy Ratings) ALUK WER A Certificate ALUK WER B Certificate ALUK WER C Certificate Rehau S706 WER A Certificate Rehau S706 WER B Certificate Rehau S706 WER C Certificate Rehau Heritage WER A Certificate Rehau Heritage WER B Certificate Rehau Heritage WER C Certificate Rehau Edge WER A Certificate Rehau Edge WER B Certificate Rehau Edge WER C Certificate Residence 2 WER A Certificate Residence 7 WER A Certificate Residence 9 WER A Certificate
