September 2017 Print

Message from the President

Welcome to another new year for the North Piedmont Chapter! We are excited to kick off this new year with a fresh new website design which just recently went live. We hope you like it and find it easy to navigate and informative!

The 2017-2018 calendar year is going to be packed with great meetings, volunteer opportunities, and fun outings, as our goal this year is to not only attract new members, but re-engage with the members who may have stepped away. The involvement of the entire membership, and not just the board, is vital to the overall success of our chapter, and we encourage you to participate this year.

Some exciting news to share:

We are proud to have formed a partnership with the City of Greensboro through the Adopt-A-Park program, in which our chapter will do a cleanup of Three Meadows Park in north Greensboro (4) times a year for the next two years. Our chapter will be recognized with a sign in the park as the official sponsor of this program.

The chapter programs this year will continue to provide PDH opportunities for registered PE’s. Please make use of this easy opportunity to earn your credit hours.

Hoffman & Hoffman has generously donated their conference center for (3) chapter meetings. These meetings will be fully catered and provide excellent topics during your lunch hour. We will continue to have a few lunch meetings at Starmount Forest Country Club, so it is important to note the location on the meeting invitation before you head on out!

We are excited to continue our partnership with NC A&T student chapter of ASHRAE, even as Dr. Nassif has moved on. Dr. Ahmed Megri will be taking the lead on the promotion and sponsorship of the NC A&T student chapter of ASHRAE, and we are excited to host our October meeting in their new science building on campus.

As always, feel free to contact me with your feedback and suggestions.

We look forward to seeing you at our first chapter meeting!



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Chapter Technology Transfer and Programs

Below is the chapter schedule for the remainder of the calendar year!!!

9/14/2017 - Hoy Bohanon - Update on ASHRAE 62.1

10/18/2017 - Hank Jackson - "Beam me up, Scottie!" - Transport Energy


11/15/2017 - Dennis Knight - "Time Management in the Workplace"


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Research Promotion

Greetings, North Piedmont Members.  “Congratulations” and a very big “Thank you” are in order as we transition into the 2017-18 Campaign.   For those unable to attend the CRC, your North Piedmont Chapter took home some high honors, including Runner-Up for Most Dollars Raised per Assigned Member for our chapter size.  And that is society-wide!  We’re sending a message that our chapter is one that cares about the advancement of our industry and that we have some generous members who believe in paying it forward.  To all our donors, on behalf of ASHRAE, Thank You very, very much.

Looking forward to this year, we are already off to a strong start thanks to the efforts of our terrific CRC committee.  Over $2,000 was raised by way of a silent auction during our awards dinner, all of which benefits RP, and all of which counts toward N. Piedmont’s campaign. 

Just as a heads up, planning is underway for our Annual Holiday Party and RP Auction.  We’re eyeing that second week in December and will be sending out a save-the-date just as soon as it is finalized.  Also keep an eye out for updates on our Fall Golf Outing, sure to be hitting your inboxes soon.

One more time, Thank You to our donors and sponsors who, year after year, put North Piedmont at the top of the list!  For those interested in becoming a sponsor, please contact me at  


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Referrals are the top reason new members join ASHRAE and we need your help! Encourage any colleagues who could benefit from what ASHRAE has to offer!

As an ASHRAE member, your referral is a very powerful tool that can benefit your colleagues, your Society, and the HVAC&R industry. Thank you again for doing your part to help the Society grow.

Any new members are elgible to recieve a complimentary lunch with our chapter president, Kevin McDonald! (Up to $10 value)

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Young Engineers in ASHRAE (YEA)

We have an exciting year ahead for us in ASHRAE and I want to thank you all for participating this year.  I want to let everyone know that there is an upcoming YEA Leadership Weekend being held in Baltimore, MD.  The event will be from October 13-15th.  The North Piedmont Chapter will fund one person from our chapter to attend.  If you are interested please send me an email ( so I can send you an application for the chapter to sponsor you. If you want to register for the event please click on the following link: YEA Leadership Weekend Registration. Registration is $450 and includes hotel and meals for the weekend. I hope to see you at our first ASHRAE meeting!

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The greater Greensboro area is quickly becoming a hub for good beer, with many new breweries popping up seemingly all the time...It is our duty, as a chapter, to tour these new breweries and taste their many delicious beers. The first tour is in the process of being scheduled and an annoucement is coming soon!

Stay thirsty, mis amigos! 

Refrigeration Chair: Kevin Heywood

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Air conditioning history and timeline

Ever since the discovery of fire, heating has played an essential role in the design of human living spaces. But it’s a little different with air conditioning. Nowadays we have a hard time imagining the sweltering hot temperature of some locales without the luxury of a cool breeze from the central air conditioner blowing in our face. But in fact, people lived for centuries without cooling appliances. When did the need for cool air indoors arise, and where does the invention of air conditioning units fall in history?

Early use

Though they had nothing like modern-day air conditioning, human beings used little tricks to cool themselves since ancient times. Though dates aren’t known for some of the early methods of cooling air, there’s evidence of the use of air conditioning science that dates back millennia.

Ancient Egypt: Some evidence suggests that ancient Egyptians understood the power of evaporation for cooling purposes. They were one of the first people to use a rudimentary form of air conditioning by hanging wet cloths in doorways to create an evaporation cooling effect. When the wind blew past such hangings, it produced a fresher breeze.

Ancient China: Air cooling can be traced back as early as 180 AD in China, and the time of Ding Huan. Huan invented a hand-cranked rotary fan that produced a breeze.

Ancient Rome: This Mediterranean empire created many ingenious inventions that made life easier: the aqueduct was one of the most famous. Aqueducts were used to pump water to various parts of the city, and even to individual homes. There is evidence of aqueducts that were routed inside the walls of wealthy Roman homes to circulate water and cool the air.

1758: Benjamin Franklin and his colleague John Hadley, professor at Cambridge University, gave a presentation on their investigation of the effects of evaporative cooling. They stated that evaporating inconstant liquids (such as alcohol) on the surface of water can cool an object to freezing.

1820: English inventor Michael Faraday successfully performed a similar experiment using ammonia, which was the volatile liquid used in the first modern air conditioning unit.

1830s: Dr. John Gorrie, an American physician, began work on the first mechanical cooling apparatus ever recorded. It blew air through a cloth doused in ice-cold water. Though large and bulky, and requiring an unearthly amount of ice water to work, it had the power to cool a room by as much as 20 degrees.

1851: Dr. Gorrie patented his ice-cooling invention, which by this time was used specifically in hospital rooms.  It was revolutionary in creating a healthier environment for treating yellow fever and other ailments.

Modern air conditioner

The first modern air conditioners arrived at the turn of the 20th century, and involved several rudimentary models. Thanks to innovations that came with the industrial revolution, we can enjoy cooling effects that dramatically improve our quality of life.

1902: Willis Carrier invented the first air conditioner reminiscent of today’s models. This discovery was driven the need for cooling in certain manufacturing processes. Working with the Sackett-Wilhelms Lithographing and Publishing Co., who needed an efficient way to cool paper during printing, Carrier invented a machine that blew air over cold coils to produce the cooling effect. The machine de-humidified and cooled the air so paper would stay smooth and the ink fresh. This machine had the ability to cool air significantly and lower humidity levels by nearly 55 percent.

1911: Carrier presented his Rational Psychometric Formulae, which is the fundamental science used behind air conditioning technology today.

1914: The first in-home air conditioning machine is installed in a Minneapolis mansion. It was seven feet high and 20 feet wide. Up to this point, air conditioning had only been used in hospital or manufacturing settings.

1920: Engineers discovered a replacement for toxic ammonia in their cooling system: the much safer coolant dyeline. They also made the units significantly smaller so they could be placed in department stores, office buildings, and railroad cars.

1930: The White House and several executive office buildings were equipped with air conditioning.

1931: H.H. Schultz and J.Q. Sherman invented the first window unit air conditioner at an extremely steep cost.

1950s: Air conditioners became extremely popular in suburban homes during the middle of the century, and records show there were roughly 74,000 air conditioners installed during this time.

1953: The popularity of air conditioners had risen so much there were more than a million requests for air conditioning, and the supply could not equal the demand.

1957: Quieter air conditioning units were produced, thanks to the invention of the rotary compressor, which created the same effect with greater efficiency.

1970s: Central air conditioning was implemented in most commercial buildings in large cities, and many air conditioning companies popped up to help meet the demand.

1990s: Energy used for air conditioning doubled over the span of 10 years, which made it necessary to produce more energy-efficient units in response to modern environmental laws.

2007: The percentage of US homes with air conditioning reaches 86 percent.

2015: Today, in excess of 100 million US homes have air conditioning, and that number is growing all the time.

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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