Engineers Newsletters & Engineers Newsletters Live!

Trane Engineers Newsletters are topical, informative articles that provide engineering professionals who design HVAC systems with reliable, objective, and technologically current information in a non-commercial format.

For over 50 years, these newsletters have been published by Trane Applications Engineering group to aid engineers in the design and application of HVAC systems. Subjects range from acoustics to water piping to interpretation of ASHRAE standards. These newsletters have become a trusted technical resource, with a current circulation of more than 40,000.

Read the latest Trane Engineers Newsletter

HVAC-Related Changes to ASHRAE® Standard 90.1-2022

Jurisdictions have begun to adopt ASHRAE 90.1-2019; some have even begun to adopt ASHRAE 90.1-2022. Practitioners often look to the 2022 version for ideas on ways to reduce energy over the 2019 version, whether due to participation in above-code programs, preparation for the future, or simply as a design preference for energy and utility cost saving. This Engineers Newsletter describes important changes in the 2022 edition that affect HVAC systems and related equipment.

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Engineers Newsletter LIVE!

Trane Engineers Newsletter LIVE programs are technical, in-depth 60-minute programs covering the topics listed below. Many are available on-demand, free of charge for continuing education credit.

Q4 Engineers Newsletter LIVE

Operation and Control of Electrified Hydronic Heating Systems

Hydronic heating systems require control methods and considerations that are different from traditional chilled-water systems. The rapid adoption of electrified heating systems creates a steep learning curve for engineers, operators, and owners. This program addresses many of the control considerations for electrified heating systems.

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Or contact your local Trane office for local events

Watch On Demand

Did you miss the live viewing of a previous ENL? Visit our Trane Engineers Newsletter LIVE program library to view previous programs on a wide variety of technical topics. Many include additional resource materials and are available on-demand and free of charge for continuing education credit.

Engineers Newsletter

Many of our past Engineers Newsletters can be found in the various topic sections below.

  1. VAV Systems and Open Ceilings

    by Eric Sturm, 2021, volume 50-3

  2. Understanding VAV Sound Standards

    by Eric Sturm, 2018, volume 47-4

  3. 100 Years of Trane History

    by Mick Schwedler and Eric Sturm, 2013, volume 42-1

  4. Direct-Drive Plenum Fans and Fan Arrays

    by Dustin Meredith, John Murphy, 2010, volume 39-1

  5. Acoustical Considerations for Large Rooftop Units

    by Dave Guckelberger, 2009, volume 38-2

  6. A New Standard for Acoustics in the Classroom

    by Dave Guckelberger, 2003, volume 32-1

  7. Sound Ratings for ARI Standard 260P

    by Dave Guckelberger, 2000, volume 29-1

  8. Specifying “Quality Sound”

    by Dave Guckelberger, 1996, volume 25-3

  9. Sound Propagation from Air-Cooled Chillers

    by Dave Guckelberger, 1988, volume 17-3

  1. Using Hot Gas Reheat for Humidity Control

    by Eric Sturm and Greg DuChane, vol. 52-2

  2. Heating with Lower-Temperature Hot Water

    by John Murphy, 2022, volume 51-4

  3. Networked Coil Loops

    by Ronnie Moffitt, 2022, volume 51-5

  4. Terminal Systems-Reviving IEQ!

    by Eric Sturm, 2022, volume 51-3

  5. Condensation in Air-Handling Systems

    by B. Hafendorfer, 2017, volume 46-4

  6. Evaluating Efficiency in Air-Moving Systems

    by B. Coleman, D. Guckelberger, D. Meredith, 2017, volume 46-3

  7. DOAS with Sensible-Cooling Terminal Units

    by John Murphy, 2017, volume 46-2

  8. FANtastic! A Closer Look at Fan Efficiency Metrics

    By Dustin Meredith, 2014, volume 43-3

  9. Understanding Single-Zone VAV Systems

    by John Murphy, 2013, volume 42-2

  10. 100 Years of Trane History

    by Mick Schwedler and Eric Sturm, 2013, volume 42-1

  11. Effects of Altitude on Psychrometric Calculations and Fan Selection

    by Trane Applications Engineering, 2011, volume 39-4

  12. Direct-Drive Plenum Fans and Fan Arrays

    by Dustin Meredith and John Murphy, 2010, volume 39-1

  13. Understanding Chilled-Beam Systems

    by John Murphy, 2009, volume 38-4

  14. Keeping Cool with Outdoor Air: Airside Economizers

    by Dennis Stanke, 2006, volume 35-2

  15. Advances in Desiccant-Based Dehumidification

    by John Murphy, 2005, volume 34-4

  16. Cooling-Coil Heat Transfer

    by Don Eppelheimer, 2002, volume 31-1

  17. Commercial Building Pressurization

    by Dennis Stanke, 2002, volume 31-2

  18. Air-to-Air Energy Recovery: Energy-Conscious Design Ideas

    by Dennis Stanke and John Murphy, 2000, volume 29-5

  19. The Three E’s of Geothermal Heat Pump Systems

    by Mick Schwedler PE, 2001, volume 30-2

  20. Cool Air Makes Good Sense

    by Don Eppelheimer, 2000, volume 29-2

  21. Designing an ASHRAE 62-Compliant Ventilation System

    by Dennis Stanke, 1995, volume 24-2

  22. VAV System Optimization: Critical Zone Reset

    by Dennis Stanke, 1991, volume 20-2

  1. Artificial Intelligence in the HVAC Industry

    by Greg DuChane, 2024, volume 53-3

  2. Hydronic Heat Recovery Control

    by Mick Schwedler, 2024, volume 53-1

  3. Short-Circuit Current Rating Refresher

    by Bob Coleman, 2022, volume 51-1

  4. 100 Years of Trane History

    by Mick Schwedler and Eric Sturm, 2013, volume 42-1

  5. Short-Circuit Current Rating Update

    by Dave Guckelberger, 2012, volume 41-2

  6. Brushless DC Motors: Setting a New Standard for Efficiency

    by Dave Guckelberger, 2004, volume 33-4

  1. Electrical Power Quality for HVAC Equipment

    By Ben Sykora, 2025, volume 54-1

  2. Hydronic Variable Refrigerant Flow HVAC Systems

    by Dustin Meredith, 2023, volume 52-4

  3. Using Hot Gas Reheat for Humidity Control

    by Eric Sturm and Greg DuChane, vol. 52-2

  4. Heating with Lower-Temperature Hot Water

    by John Murphy, 2022, volume 51-4

  5. Terminal Systems-Reviving IEQ!

    by Eric Sturm, 2022, volume 51-3

  6. Introduction to Decarbonization in HVAC

    by Emma Van Fossen, 2022, volume 51-2

  7. Harmonic Distortion in Electrical Systems

    by Dave Guckelberger and Bob Coleman, 2018, 47-1

  8. LEED v4

    by Chris Hsieh and Jeanne Harshaw, 2014, volume 43-1

  9. HVAC Refrigerants: A Balanced Approach

    by Jeff Moe and Mike Thompson, 2011, volume 40-2

  10. Green Progress, Change for the Better—LEED® 2009

    by Mick Schwedler, 2009, volume 38-1

  11. Ice Storage as Part of a LEED® Building Design

    by Paul Solberg, 2007, volume 36-3

  1. HVAC-Related Changes to ASHRAE® Standard 90.1-2022

    by Michelle Hull, 2025, volume 54-5

  2. A2L Refrigerants and ASHRAE® Standard 15

    by John Murphy, 2023, volume 52-3

  3. Standards and Codes and Wizards...Oh My!

    by Rick Heiden and Caitlin Bohnert, 2021, volume 50-4

  4. HVAC-Related Changes to ASHRAE 90.1-2019

    by Rick Heiden, 2020, volume 49-4

  5. ASHRAE® Guideline 36

    by John Murphy, 2021, volume 50-2

  6. ASHRAE® Standard 62.1-2019 Update

    by John Murphy, 2020, volume 49-3

  7. Updated ASHRAE® Recommendations for COVID-19

    by John Murphy, 2021, volume 49-2

  8. ASHRAE Standard 90.1-2016: HVAC-Related Updates

    by Susanna Hanson, 2018, Vol. 47-2

  9. Evaluating Efficiency in Air-Moving Systems

    by B. Coleman, D. Guckelberger, D. Meredith, 2017, volume 46-3

  10. ASHRAE Standard 189.1-2014

    by Chris Hsieh, 2017, volume 46-1

  11. FANtastic! A Closer Look at Fan Efficiency Metrics

    by Dustin Meredith, 2014, volume 43-3

  12. Understanding Single-Zone VAV Systems

    by John Murphy, 2013, volume 42-2

  13. Short-Circuit Current Rating Update

    by Dave Guckelberger, 2012, volume 41-2

  14. ASHRAE Standard 189.1-2011

    by Dennis Stanke, 2012, volume 41-1

  15. Minimum Outdoor Airflow Using the IAQ Procedure

    by Dennis Stanke, 2011, volume 40-3

  16. 90.1 Ways to Save Energy: ASHRAE/IESNA 90.1—1999 Update

    by Mick Schwedler PE, 2001, volume 30-1

  17. The Tortuous Path from Industry Standard to Local Code

    by Dave Guckelberger, 1999, volume 28-2

  18. ARI Standard 550/590-1998: Implications for Chilled-Water Plant Design

    by John Murphy and Andy Poselenzny, 1999, volume 28-1

  19. Designing an ASHRAE 62-Compliant Ventilation System

    by Dennis Stanke, 1995, volume 24-2

  20. Refrigeration System Equipment Room Design

    by Dave Guckelberger, 1992, volume 21-2

  21. ASHRAE 62-89 Analysis (Part 1): General Requirements

    by Dennis Stanke, 1992, volume 21-3

  1. Hydronic Heat Recovery Control

    by Mick Schwedler, 2024, volume 53-1

  2. Heating with Lower-Temperature Hot Water

    by John Murphy, 2022, volume 51-4

  3. Pressure-Independent Control Valves

    by Susanna Hanson, 2021, volume 50-1

  4. What Drives Chiller Efficiency

    by Michael Patterson, 2019, volume 48-1

  5. Chilled-Water System Design Decisions

    by Trane Applications Engineering, volume 47-3

  6. Condenser-Water System Retrofit Opportunities

    by Mick Schwedler and Jeanne Harshaw, 2016, volume 45-1

  7. Chiller Selection Made Easier with myPLV™

    by Brian Sullivan and Jeanne Harshaw, 2015, volume 44-4

  8. Dual-Temperature Chiller Plants

    by John Murphy, 2015, volume 44-3

  9. The Impact of VSDs on Chiller Plant Performance

    by Lee Cline and Brian Sullivan, 2013, volume 42-4

  10. The Impact of Variable-Speed Drives on HVAC Components

    By Eric Sturm and Susanna Hanson, volume 42-3

  11. 100 Years of Trane History

    by Mick Schwedler and Eric Sturm, 2013, volume 42-1

  12. Commercial Geothermal is Heating Up!

    by Lee Cline, 2011, volume 40-1

  13. Understanding Chilled Beam Systems

    by John Murphy, 2009, volume 38-4

  14. "Free" Cooling Using Water Economizers

    by Susanna Hanson, 2008, volume 37-3

  15. Ice Storage as Part of a LEED® Building Design

    by Paul Solberg, 2007, volume 36-3

  16. Waterside Heat Recovery

    by Mick Schwedler, 2007, volume 36-1

  17. Variable-Primary-Flow Systems Revisited

    by Mick Schwedler PE, 2002, volume 31-4

  18. Chilled-Water Plants and Asymmetry as a Basis of Design

    by Don Eppelheimer, 1999, volume 28-4

  19. “Off-Design” Chiller Performance

    by William Landman, 1996, volume 25-5

  20. How Can This Be? (Chiller Efficiency)

    by William Landman, 1996, volume 25-1

  21. Tower Water Temperature ... Control it how?

    by Mick Schwedler PE, 1995, volume 24-1

  22. A New Era of Free Cooling

    by William Landman, 1991, volume 20-3

  23. How Much Ice?

    by Don Eppelheimer, 1990, volume 19-1

  24. Chiller Plant System Performance

    by Dave Guckelberger, 1989, volume 18-2

  25. An Engineering Strategy for Ice Storage

    by Don Eppelheimer, 1987, volume 16-6

  1. Hydronic Variable Refrigerant Flow HVAC Systems

    by Dustin Meredith, 2023, volume 52-4