HTRI technical support is available to all members. However, each individual is required to have a unique account. If you do not have an account yet, please create one on our website:

Submit an Inquiry

When you submit your inquiry, please include your corporate signature:

  • your title
  • work address including country
  • full corporate identification information for our records

This is required each and every time you contact HTRI Technical Support.

Having an existing account and providing this information will ensure you will receive the fastest response.

The format below serves as an example of the information required.

John Doe
Senior Project Engineer
+1.979.690.5050 (Direct) | [email protected]

Heat Transfer Research, Inc.
P.O. Box 1390 | Navasota, TX 77868 USA | +1.979.690.5050


If your inquiry concerns a particular case, be sure to send the following:

  • A saved .htri input file (not a PDF or Excel spreadsheet of the output)
  • The specific HTRI software program name(s) and version number(s) you are using (Example: Xist, Version 9.1)

Response Time

HTRI strives to respond to all inquiries within 3 business days following receipt. If any exception is necessary (e.g., due to complex analysis that may require additional time), we will send an interim notice stating the expected date of our response.

Closing Ticket

We will send a closing email once we believe we have resolved the inquiry. If you have further questions and/or concerns, please respond to our closing email and we will try to address any open issues as best as we are able.

HTRI members are welcome to provide feedback on how our HTRI technical staff as performed by emailing [email protected]

More Resources

Browse FAQs, TechTips, Software Documentation and more.

Downloads and Updates

Ensure you are running the most up-to-date version

Design Manual/ Research Reports/ Others

HTRI's calculation methods and underlying basis for those methods


Tips and tricks for better exchanger design

FAQs – Installation and Security

Frequently asked questions about installing and licensing HTRI software

Webinars / Tutorials

HTRI training on your schedule

Training & Conferences

See the schedule of training events

Known Issues

The latest information about issues related to released versions of HTRI software

Meet Support Group

Lauren Moran

Lauren Moran

Director, Engineering Services

Location: USA

David Frankum

David Frankum

Senior Engineer, Technical Support

Location: UK

Ryota Suzuki

Ryota Suzuki

Technical Support & Sales

Location: Japan

Ashley Simmons

Ashley Simmons

Lead Project Engineer, Engineering Services

Location: USA

Peter Joosten

Peter Joosten

Manager, Technical Support & Sales

Location: Australia

Matthew Berger

Matthew Berger

Senior Project Engineer, Engineering Services

Location: USA

Shayne Stevenson

Shayne Stevenson

Engineer, Technical Support

Location: USA