The purpose of this standard is to establish for Liquid to Liquid Heat Exchangers: definitions; test requirements; rating requirements; minimum data requirements for Published Ratings; marking and nameplate data; and conformance conditions.
ANSI/AHRI 400-2001 history
2001ANSI/AHRI 400-2001 Liquid to Liquid Heat Exchangers (formerly ANSI/ARI 400-2001)