HEI standards are continually reviewed by each Technical Committee at scheduled meetings under the direction of each Section. Suggestions for improvement of HEI standards are welcome and should be sent to the HEI Office, hei@heatexchange.org.

HEI continually revises and updates all standards to reflect the most recent technological and engineering trends within the industry. HEI welcomes comments and suggested revisions from end users of HEI standards. To ensure that HEI standards are meeting the needs to the industry, we ask that standards users participate in a brief survey to share their thoughts and feedback with HEI. Please click on the following link: HEI Survey to participate in this survey.