Central PA ASHRAE Newsletter February 2011
Board and Committee Chairs
President's Message
Mark Graybill, PE
Andrew Odell
Vice President
Nathan Potteiger
Alyssa Adams, LEED AP
David Bender
Michael Conchilla, PE
Daniel Hanley
D. Todd Postlethwait, PE, LEED AP
CTTC (Programs)
Andrew Odell
Education Committee
Thomas Long, PE
Student Activities
Alyssa Adams
Research Promotion
Robert Miller
Nathan Potteiger
D. Todd Postlethwait, PE, LEED AP
Publicity (Web and Newsletter)
Mark Tome, PE, HFDP, LEED AP
In This Issue

Greetings ASHRAE Members,

On January 20, my family was blessed with a new member, David Benjamin Graybill. It is amazing to witness the birth of a child and hold them in your hands. The past few days have been wonderful watching him experience this new world.

It is hard to believe that I am now half-way through my term as President of the Central Pennsylvania ASHRAE Chapter. While ASHRAE is not my immediate family, in some ways the chapter does feel like family. As a chapter, we are beginning to prepare for next year and will be looking for people willing to be involved as officers, committee chairs and committee members.

We had one of our highest-attended non-joint meetings in memory last month for a presentation on the Building Information Modeling Process (BIM) by John I. Messner, Ph.D., a professor at Penn State University. It was a very informative presentation with a lot of useful discussion. It will be interesting to see how BIM permeates the construction process in the coming years.

Please join us on February 9 at the Appalachian Brewing Company for a presentation on “The Latest in Dedicated Outdoor Air Systems (DOAS)” by ASHRAE Fellow and Distinguished Lecturer Stanley Mumma, Ph.D., another professor at Penn State University. Dr. Mumma is well-known for his support of DOAS. As a former student of Dr. Mumma, I can strongly recommend that you join us for his presentation.

Mark M. Graybill, PE

Employment Opportunities

Paragon Engineering Services Inc.
Mechanical Engineer, York, Pa. Office

The ideal candidate will have a bachelor’s degree in Mechanical Engineering, be a licensed Professional Engineer with 7 – 10 years of experience in providing mechanical engineering services to a diverse client base. Design and code knowledge in HVAC, plumbing and fire protection systems in commercial, industrial, and health care applications required. Must be able to design and manage multiple projects, in a fast paced environment, while staying within fixed cost budgets. Possess the ability to be client focused and able to negotiate, coordinate and resolve issues with clients. Candidate must be flexible in adapting methods to project requirements, and client requests, while staying within the company’s business structure. This is a great opportunity in a growing company with endless opportunities. We offer a competitive pay and benefits package.

You may apply by emailing your resume to:
Larry Rohrbach, HR Manager

McClure Company
Mechanical Engineer

McClure Company, a PPL Energy Services Company and the region’s largest mechanical contractor, is seeking a mechanical engineer to support growth in the energy & engineered services business.

Position Description: The daily activities of the position will include any combination of the following:

  • Conduct field surveys to assess existing conditions, customer needs and begin problem analysis.
  • Perform design calculations using sound engineering practices and experience.
  • Prepare equipment or material specifications for purchasing.
  • Interpret submittals, architectural, structural, piping/plumbing and mechanical drawings.
  • Design and layout of HVAC, Plumbing/Piping systems on commercial, institutional, pharmaceutical and healthcare projects using AutoCAD Software.
  • Work with internal resources to estimate project cost.
  • Communicate directly with field construction personnel, customers and equipment vendors.
  • Coordinate project execution with construction management, field personnel and subcontractors.

Applicant Requirements and Skills:

  • Experience in commercial HVAC and plumbing design using AutoCAD version 2005 (Building Systems or MEP experience a plus).
  • Excellent communication skills, both written and verbal.
  • Excellent organizational skills.
  • Familiarity with the A-E design process as well as a general knowledge of the construction process.
  • Ability to manage multiple priorities.
  • Excellent computer skills including Microsoft Word, Excel and MS Project.
  • Bachelor’s degree in engineering or related technical degree.
  • Minimum of 5 years experience required (PE License a plus).

McClure Company provides a full benefit package, including medical, prescription, vision and dental for all employees and their dependents at no cost, as well as a 401k/profit sharing plan.

Please forward resume and cover letter to:

Human Resources Coordinator, McClure Company
PO Box 1579
Harrisburg, PA 17105-1579
Or e-mail to:

Company website:, No phone calls please.

Central PA ASHRAE will publish employment opportunities in the Pennant at a cost of $50/month.  The Pennant is distributed twice each month (September through May) to approximately 500 people.  Contact Mark Tome (717) 814-8237 to have employment opportunities included in the Pennant

Meeting Announcement

The Latest in Dedicated Outdoor Air Systems (DOAS)
Wednesday, February 9th, 2011 @ Appalachian Brewing Company, 50 N. Cameron St, Harrisburg, PA  17101

5:00-6:00 DOAS Presentation by Stanley A. Mumma, Ph.D.
6:00-7:00 Dinner
7:00-8:00 DOAS Presentation by Stanley A. Mumma, Ph.D.


This presentation seeks to support the 6 points listed below:

  1. It is almost impossible to verify that the ASHRAE ventilation standard 62.1-2007 has been met with an all-air system.
  2. Therefore a dedicated outdoor air system (DOAS) is required for verifiable ventilation air distribution.
  3. Once the use of DOAS is in place, it is one small step to decouple the space sensible and latent loads by supplying dry Outdoor Air (OA) at a low (45-50 F) Dew Point Temperature (DPT). This results in a significant improvement in the Indoor Air Quality (IAQ), with a potential savings to US businesses of $208 billion/year (in 1996 dollars when the Gross Domestic Product (GDP) was $8,000 Billion) through reduced medical expenses and lost productivity. (source: LBL) Note: The US GDP had grown to over $14,454 Billion/yr by the end of the forth quarter 2009.
  4. That leaves sensible only cooling for the parallel system since all of the moisture is removed with the ventilation air, eliminating high humidity conditions.
  5. There are many design choices for the parallel space sensible cooling system. At this site, ceiling radiant cooling panels (CRCP)/chilled ceiling or chilled beams (technologies that are expanding here in the US, as of 8/9/08) are favored. With the DOAS-Radiant system, contaminants generated or released in one space are not distributed throughout the building by the HVAC sys.
  6. THE BENEFITS OF THIS APPROACH: This mechanical system design concept, when compared to the conventional all air VAV system, results in lower first and operating costs, provides superior IAQ and thermal and acoustical comfort, reduces the hazard of a biological or chemical attack in the building, reduces the required plenum depth, and is easier to balance and maintain.

The challenge of conforming to ASHRAE Standard 62.1-2007 in an energy efficient manner has led some HVAC practitioners to the conclusion that using dedicated outdoor air systems (DOAS) in conjunction with sensible cooling at terminal units offers the best solution.

Speaker Bio:
Dr MDr. Mumma, ASHRAE Fellow and Distinguished Lecturer, is currently Professor Emeritus, Architectural Engineering Department, College of Engineering at The Pennsylvania State University, University Park, PA

Online or or 717-939-3600 ask for Andrew Odell
Deadline: Monday February 7th, 2011

Chapter Members: $30.00
Non members: $40.00
Retired: $5.00

Note to all Chapter Officers and Committee Chairs: Chapter Officers, Board Members and Committee Chairs have standing reservations.  If you do not RSVP by the deadline, you will be billed for the fun time you missed.

2011 Schedule (revised 01/30/10)

Print/PDF Version
Date & Location Event
February 9

Appalachian Brewing Company
50 N. Cameron St, Harrisburg

The Latest in Dedicated Outdoor Air Systems (DOAS) by ASHRAE Fellow and Distinguished Lecturer Dr. Stanley Mumma, PhD

March 9

Appalachian Brewing Company
50N. Cameron St, Harrisburg

Membership Promotion Night

Hydronic Balancing in a Variable System by Bill England, FDI Hydronic Training Manager

April 14

Appalachian Brewing Company
50N. Cameron St, Harrisburg

Student Activities Night

Student Presentations

April 21 - 1:00-4:00 PM
ASHRAE Webcast
Ground Source Heat Pump Systems – Putting the Earth to Work for You
May Family Night - Local Baseball
July Annual Golf Event
August 14 & 15



Member News

The Chapter congratulates the following people who are new to ASHRAE membership:

  • Mr. Todd DeBock -- JCI
  • Mr. David Hostetter -- Center Point Engineering

Congratulations to Greg Hlatky of H&H Sales Associates -- Greg recently passed the PE Exam.

Congratulations to Mark Graybill on the birth of a son, David Benjamin

Have information to share? New hires, promotions, retirements, etc.
Put it in the Pennant!

Society News