MPI panel doors have a polystyrene core (U= .156 / R= 6.4), rigid pre-formed closed cell board 1 lb. density (Min.). Conforms to ASTM C578, Type 1. Fire ratings available up to 3 hours- pairs and singles. MPI doors have been tested and found to meet/exceed the requirements of ANSI A250.4, Level “A”.
Below are some of the styles which are available. Consult factory for additional information.