National Refrigerants, Limited (NRL) is an independent worldwide distributor
of refrigerants and all associated refrigerant management services.

REFERENCE GUIDE

NRI Refrigerant Reference Guide, 5th Edition, contains the latest information on
R-22 alternatives, the 2010 EPA regulations, as well as all of the standard technical data on refrigerants,
refrigerant blend behavior tutorial, retrofit procedures, and NRI products and services information
that our Reference Guide is famous for.