January 2017 Print

Message from the President

First, thank you to everyone who made it to the Christmas party. The party was a great success and we look forward to doing it again next year. If you have any ideas or suggestions to make it better, please let someone on the board know.

Second, thanks to everyone who attended our first chapter meeting of the year, with Distinguished Lecturer Henry Slack. Mr. Slack spoke on the topic of IAQ and gave a new perspective to the notion.

As we look ahead, the Chapter is thrilled to host Society President Tim Wentz on February 8. Tim will be meeting with chapter sponsors, the students and student branch at North Carolina A&T, as well as presenting during our lunch meeting at Starmount. Be sure to register and attend - you won't want to miss Tim's presentation!

In other news, Chapter officers and board members are hard at work planning events for our members and our community, such as participating in a career fair at a local middle school to teach students about jobs in HVAC. We are also working on the CRC meeting for the region, which the Chapter will host here in Greensboro in August.

There's a lot going on, so be sure to read the newsletter, check the website and calendar, and follow us on Facebook.

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Chapter Technology Transfer and Programs

As ASHRAE’s president, Wentz chairs the Society’s Board of Directors and Executive Committee.  His theme, Adapt Today to Shape Tomorrow, is based on the goal in the Society’s Strategic Plan to adapt. Wentz relates this goal to his personal history of moving from a slide rule in his early college days to a hand calculator and now a computer or smartphone as an example of the challenges and opportunities inherent in adapting to new technology.

“All of us have had to come face-to-face with the challenges of adaptation,” he said. “It’s in the power of adapting that lives, organizations, and communities, are transformed. Our ability to shape tomorrow is borne out of our willingness to adapt today. Together, we can create our future by adapting our resources, investments and technology to shape a more sustainable world.”

Wentz was awarded a Bachelor of Science in Mechanical Engineering and a Master’s in Business Administration from the University of Nebraska. Upon graduation, Wentz went to work for his family’s mechanical contracting firm. As the fourth generation to join the firm, he had the opportunity to develop an expertise in mechanical design, estimating and construction management. He spent 19 years in the industry, working on a wide range of mechanical projects throughout the Midwest, including hospitals, nursing homes, schools, factories and other large commercial enterprises.

Since entering academia, Wentz has received numerous awards and honors for his teaching and service to the HVAC industry. He is the recipient of an Exceptional Service Award, a Distinguished Service Award, the E.K. Campbell Award of Merit, a Region IX Regional Award of Merit, a Region IX Chapter President of the Year and a Regional Energy Award.

The Mechanical Contractors Association of America (MCAA) has named Wentz their national “Educator of the Year” on three occasions and in 2009 awarded him its highest honor, the Distinguished Service Award. He also has received the Durham School of Architectural Engineering and Construction’s Outstanding Educator Award and the College of Engineering’s Holling Award for outstanding teaching and mentoring.

Wentz previously served as president-elect, treasurer and two terms as vice president on the Board of Directors and also as Region IX director and regional chair.

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Research Promotion

Happy New Year to all, and best wishes for a great 2017!  We are just past the halfway point in our Research/Resource Promotion campaign and, at $13, 462.00, currently sitting just under halfway to our goal of $28,000.00.  As always, “Thank You” to everyone who has so generously donated, as well as to our faithful sponsors who keep the wheels turning year after year for our North Piedmont Chapter.

I’d also like to thank everyone who made it out on what ended up being one of the coldest days of the year to our Christmas party and RP auction!  With your help, we raised $7,300.00, beating last year’s total by $700!  I think it’s safe to say a good time was had by all.  Thank you to Smitty’s Oyster Bar of Kernersville for the food, Tom Essa with Party in a Tent for the roof over our heads (and the heat!), Natty Greenes and Hazel Jean Vineyards for the refreshments, and certainly all our generous donors!

Looking towards the finish line now, we still have a long way to go to meet goal but I’m confident we can get there.  As the weather warms up, start working out the kinks in your golf swing for our spring outing, and, if golf isn’t your thing, keep your eyes peeled for a joint RP and Refrigeration Cornhole tournament that is in the works!  Also, if you’d like to be a sponsor but don’t know who to contact, please reach out to me at  

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Calendar of Events

The March meeting will be Thursday, March 16 and hosted by USGBC. For more information, including how to register for the meeting with USGBC, visit: or

The April meeting will be Wednesday, April 12 at 11:30 and feature North Piedmont's own Distinguished Lecturer Chuck Gulledge. Registration for the event will open late March.

The chapter will host a viewing party for the annual ASHRAE Webcast on April 21 from 1-4 at Hoffman & Hoffman. Snacks and refreshments will be provided. The event is free; however, we ask that you register so we can make sure enough space is provided. Registration is open at:

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Thank you to those of you that have renewed your membership already this year. Please encourage those in our industry that are not members of ASHRAE to join today! Bring them to the next meeting or outing. If you have any questions about membership please don't hesitate to contact me at and I will help in any way that I can!

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Young Engineers in ASHRAE (YEA)

We have some fun and exciting events lined up for this year.  Please be on the look out for them and I hope you will all participate.

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Carl Linde 1842 – 1934

Carl Linde (1842-1934) studied Mechanical Engineering at Zurich Polytechnic and beginning in 1864 was employed as a locomotive builder. In 1868 he was appointed Associate Professor of Mechanical Engineering at the Technical University of Munich where he established the technical journal Bayerisches Industrie-Blatt (Bavarian Journal of Industry and Trade). His articles in the journal focused on the thermodynamics of mechanical systems.

In 1870, he entered a contest to invent a system that would keep paraffin at a uniform low temperature year round. Linde pursued the project using a rigorous thermodynamic approach to analyze existing systems of refrigeration resulting in a vapor-compression refrigeration system that was energy efficient as well as practical in cost. He published his analysis in two papers in 1871: Mechanical methods of extracting heat at low temperatures and Advanced Ice and Refrigerating Machines which lead him to design and patent a very efficient ammonia vapor compression system in 1876. These papers came to the attention of members of the German brewing industry who approached Linde requesting that he construct a refrigerating machine which after some experiments furthered the design and patent of his advanced ammonia vapor- compression system.

In 1879 he resigned his professorship and started his own manufacturing company, Gesellschaft fur Linde’s Eismaschinen (Company for Linde’s Ice Machines) in Wiesbaden, Germany. His refrigeration machines were sold throughout the world, particularly to breweries. In the US, his systems were sold by the Fred W. Wolf Co. in Chicago after 1880. By 1900, his vapor compression systems were considered to be at least 20% more efficient than any of his competitors.

In 1875, while teaching at the Technical University of Munich, he established a laboratory for theoretical mechanical engineering to test various methods of refrigeration. Beginning in 1894, he specialized in cryogenics and developed the first methods to commercially liquefy air. He was the first to construct an air liquefaction plant using the Joule-Thompson effect. He continued to improve the process, constructing a number of specialized liquefaction plants.

Carl Linde was the first president of the German Society of Refrigerating Engineers founded in 1909. It was said of him: “Carl Linde shone at one and the same time as a scientist, professor, engineer and industrialist, qualities rarely united in one man.”

Mr. Linde was recognized as an ASHRAE Pioneer of the Industry at the Society’s 2015 Winter Conference.

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This site is maintained by the North Piedmont Chapter Webmaster.  ASHRAE uses its best efforts to promulgate Standards and Guidelines for the benefit of the public in light of available information and accepted industry practices. However, ASHRAE does not guarantee, certify, or assure the safety or performance of any products, components, or systems tested, installed or operated in accordance with ASHRAE's Standards or Guidelines or that any tests conducted under its Standards or Guidelines will be non-hazardous or free from risk.

This web site is maintained by the North Piedmont Chapter of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE). It does not present official positions of the Society nor reflect Society policy. ASHRAE chapters may not act for the Society and the information presented here has not had Society review. To learn more about ASHRAE activities on an international level, contact the ASHRAE home page at