My understanding is that DuPont has removed the listing for Halon systems. My memory tells me that comes from an advertisment in the NFPA Journal. I have not seen any information about removing systems or portables with halon as the suppressison agent. I did do a google search on DuPont Halon, and found over 4,000 pages available. On the DuPont site, I found no information about removing the listing for systems. Halon has not been manufactured in the US, France, Spain, UK and other countries for several years. After halon production was discontinued in the above countries, it was and is manufactured in countries such as Nigeria. Recycled Halon is also available.
New clean agent systems include FM 200, Intergen and other chemicals.
Fireguy