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Lew Harriman, Fellow ASHRAE

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ASHRAE Course Instructor

Lew Harriman, Fellow ASHRAE


    Lew Harriman, Fellow ASHRAE, is the emeritus director of research and consulting at Mason-Grant in Portsmouth, NH. He has over 43 years of experience with humidity control and moisture management in a broad variety of commercial, industrial, and institutional applications.

    Lew was the lead author of both ASHRAE's Humidity Control Design Guide and the ASHRAE Guide for Buildings in Hot and Humid Climates. He has served as Chair of ASHRAE Technical Committee 1.12 (Moisture Management in Buildings) and as Chair of the ASHRAE Task Group for developing a quantitative definition of a damp building (one which is damp enough to pose a health risk). He acted as the lead reviser for Chapter 64 (Moisture and Mold) of the 2019 ASHRAE Handbook—HVAC Applications. Lew's work has been selected for the ASHRAE Journal's Best Paper award twice and he has taught humidity control to more than 5000 technical professionals in North America, Asia, Europe, and the Caribbean in the last 15 years.

    Courses Taught

    6 Hour

    Humidity Control I and II: Tips for HVAC Design and Practical Solutions to Existing Problems

    3 Hour

    Humidity Control I: Design Tips and Traps

    Humidity Control II: Real-World Problems and Solutions