b'Door Model Location Security Grade Accoustic Insulation THE SURE DEFENCE RANGEJanus 3 Internal EN1627 RC3 -43dB RwJanus 4 Internal EN1627 RC4 -44.8db RwJanus Fire Internal EN1627 RC3 -43dB RwJanus 3ex External EN1627 RC3 -43dB RwJanus 4ex External EN1627 RC4 -44.8dB RwJanus Gold External EN1627 RC4 -46dB RwJanus Platinum External EN1627 RC3 -46 dB RwDoor Model Thermal Insulation Air Tightness Water Tightness Wind ResistanceJanus 3 1.3W/m2K N/A N/A N/AJanus 4 1.2W/m2K N/A N/A N/AJanus Fire 1.6W/m2K N/A N/A N/AJanus 3ex 1.3W/m2K Class 4 Class 6A Class C4Janus 4ex 1.2W/m2K Class 4 Class 3A Class C4Janus Gold 0.6W/m2K Class 4 Class 9A Class 5Janus Platinum 0.54W/m2K Class 4 Class 9 A Class 597'