October 2017 Print

Message from the President

Recently, we have become aware of proposed changes to the NC Mechanical Building code which would significantly reduce indoor air quality and ventilation requirements in our schools.

The proposed 2018 NC Mechanical Code strips away indoor air quality and ventilation requirements in our schools, doing away with current ASHRAE 62.1 fresh air intake requirements and lowering CFM required by 50%. We all know that the more comfortable the environment, the better we learn and perform. This rejection of common sense ASHRAE research is a step backward and a disservice to our children.

As recent ASHRAE research shows, air quality is a contributing factor to increased productivity and task completion. Many studies have shown that maintaining adequate ventilation and thermal comfort in our classrooms is directly correlated to higher performance, cognitive function, and student average test scores above state standards.

The North Piedmont Chapter of ASHRAE will stand against this proposed legislation and will work to reject this change to our NC mechanical building code as we, the industry experts, work to ensure clean, safe learning environments for the next generation of leaders in our state.

In the coming months, we will be formulating a plan of action to appeal and change the proposal, as well as present at public hearing in Raleigh. This will be a coordinated effort with the GGAC ASHRAE Chair in Washington DC. 

Please stay tuned for updates and join us in our efforts as we push for NC to provide at least the American national standard minimum ventilation rates in new school buildings in our state.



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Chapter Technology Transfer and Programs

We are all set with our events through the calender year. Please mark these events on your calendar and plan to join us. If you have any suggesstions or ideas for future meeting topics or venues please let me know at [email protected] 

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

11/3/2017 - ASHRAE GOLF TOURNAMENT @ BRYAN PARK : 12pm Start

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


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Research Promotion




Image result for grandoverImage result for grandover christmas tree

We are pleased to announce that the 2017 ASHRAE Christmas Party will be held on December 7th 2017 at Grandover Resort in the Griffin Room!! Grandover has been a gracious host to us this year with the accomodations for our CRC over the summer, and we are very excited to return to make this a very special evening in December. Make plans to come, bring your spouse, and enjoy getting into the holiday season with your ASHRAE colleagues! For those that want to make it an overnight date, Grandover will be providing us rooms at a special discounted rate for the evening. So come, enjoy the spa, freshen up for the Christmas Party, and celebrate throughout the evening with us!!

The Christmas Party serves as our primary source of Research Promotion funding for the society year, so we truly depend on our members to come and partake in all the fun. Dinner will be catered by Grandover, and as always we will have both the Silent Auction and the Live Auction! We are already have some awesome auction items in store for this year. 

Note: Registration for the Christmas Party will go live November 1st!!

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 [email protected].  


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Do you have a co-worker that is not an ASHRAE member? Bring them to the next meeting and let them see what we are all about. At a lunch meeting you have an opportunity to interact with Engineers, Contractors, Vendors, Building Owners, and many other experts in the HVAC industry. It is a great way to network and talk to others about various topics relevant to our industry. 



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Young Engineers in ASHRAE (YEA)

Our chapter has adopted a park this year. We have adopted the Three Meadows Park and we are going to have our Very First Park Clean-Up on October 27th (10/27) at 3pm.  After the park clean-up we will have a Brewery Tour at 5pm. 

If you are interested in volunteering for the park clean-up please email me ([email protected]).  You do not have to participate in the park clean-up to partake in the Brewery tour. 

Contact Kevin Heywood ([email protected]) if you are interested in the Brewery Tour  

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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! 

**UPDATE: The first Brewery tour is 10/27 after our Park Cleanup efforts! Location to follow!**


Refrigeration Chair: Kevin Heywood

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We all know what is HVAC? (For those who don’t know, HVAC is heating, ventilating and air conditioning.) We also know the usage and requirement of HVAC in today’s world but were there usage of HVAC in our history? Well definitely we can’t imagine the Greeks or the Romans sitting in their rooms fitted with state of art air conditioning systems but we all know they were a smarter breed and they definitely must have had some or the other means to bring them thermal comfort. Let’s take a quick look as what form of HVAC system our history had, if there were any. We definitely won’t find anything similar or even near to the technology we use nowadays but there must be some form of comfort providing system. Let’s find out!


This was a period of Greeks, Romans, Egyptians, Chinese and of course the Indians. While Egyptian’s used to use man powered fans, the Indians used to use rope fans. Roman’s used to use something known as hypocaust (a central heating system which has furnace in the basement and flues to distribute heat). It has a system for radiating heat for rooms and even steam for the bath of the rich. Chimneys were used extensively towards the start of 1400s which allowed people to have private rooms. It is also known that Leonardo Da Vince built water driven fan to ventilate a suite of rooms.

1500s- 1600s

In France, ventilating machines were used in the mines. These machines used to have a series of fans with blades which used to direct fresh air into the shaft. This was the time when the idea of houses with chimneys came to America from Europe. Large quantities of wood and coal were used during that era for heating their homes. Invention of thermometer by Galileo changed the way temperature was measured till then. Ferdinand II developed a thermometer independent of air pressure. This was the time when the very first gravity exhaust ventilation system was made for the US House of the Parliament.


Initially many countries used to use stove built of bricks or fuller’s earth. Fahrenheit invented the first mercury thermometer. The first ventilator using centrifugal fan was made.

The era saw a series of important inventions that changed the lifestyle of the people of the whole world. Benjamin Franklin invented the very first stove which is supposed to be known as the first steam heating system. Then a series of some vital discoveries by Joseph Black including latent heat changed the way heat and temperature was perceived. James Watt brought a revolution by inventing the steam engine. A stove with a furnace for heating air was used in England. This arrangement had system of pipes which could heat up even big factories. Today that arrangement is known as direct fired heat exchangers.

Heat developed from friction was considered a form of vibrations. Carnot founded thermodynamics and James Joule discovered that work produces heat. Heat started to be considered as a form of energy. Hot water heating systems were used for large commercial and public buildings. Also the first warm furnace is developed. Houses with water spray system to humidifying and cooling were used. Supply air and exhaust air systems started to be driven by steam engines.

Also the law of conservation of energy is discovered. The first and second laws of thermodynamics were made. Boilers with higher capacity were used. Laws of gases were discovered and widely put to use.  


This era saw a sudden steep in the inventions and evolution of the HVAC systems. Furnace system with centrifugal fans, high pressure steam heating systems, massive fan systems and high speed centrifugal fans and axial flow fans with small electric motors were in extremely high usage. The first fan coil dehumidifying system was made by a company called Buffalo Forge. The same company made the first spray type air conditioning device. The first railway and industrial air conditioning system was devised by Sturtevant, including a backward inclined blade centrifugal pump. Buffalo Forge designed a system to remove dust particles from air streams.

The HVAC industry started using Scotch Maine type boilers with oil and gas burners and induced or forced type fans were used. A system which brings down the temperature to 10 degree Fahrenheit but increases the humidity to uncomfortable levels was made. The Rational Psychometric Formulae for fundamental calculations was invented. A forced air system which uses a fan was made. The first centrifugal refrigeration machine was made for air conditioning large spaces.

Hydronic circulatory pumps and radiators started to be used in the air conditioning systems for circulating water in the system. The first refrigeration with a compressor was made. The first residential air conditioning was made. Room coolers that use the technology of the refrigerators were made. Panels for heating floors and ceilings started to be made. The use of solar power as a power source was made. The first man walks on moon with life support and cooling systems

The heating pump heats on the reverse refrigeration cycle and on lower outdoor temperatures. Due to the over usage of refrigerants the environment was endangered and thus the United Nations Montreal Protocol for protection of earths ozone layer was signed. With the help of international co operation chlorofluorocarbon (CFC) which depletes ozone layer was phased out from usage. A multi million dollar research program on air conditioning and refrigeration system began.


The history is in the making...

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