A system comprising first input means for receiving a transport stream from an external source, second input means for receiving an input from a memory, means for connecting the first and second input means to an interface which is arranged to provide an output stream to a decoder. H3PO4 and boric acid, materials such as wood and composite wood products that include these fire retardants, and methods of making and using same. The EHC is connected between the converter and the inverter through EHC relay.