Featured Stories

Myths, Mix-ups, and Misconceptions

Do you know what you think you know about US/EU cleanroom classifications, HEPA efficiency, and air change rules of thumb? And what does that leak really mean for performance?
By Norman Goldschmidt
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Do you know what you think you know about US/EU cleanroom classifications, HEPA efficiency, and air change rules of thumb? And what does that leak really mean for performance? Read on for further tales from the road to science-based environmental control in biopharmaceutical facilities.
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Do No Harm: Protecting IAQ In Health Care Settings

Day-to-day operations and the occasional renovation create two sets of distinct threats to IAQ and patient health.
By Garold Hamilton P.E. LEED®
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Day-to-day operations and the occasional renovation create two sets of distinct threats to IAQ and patient health. From monitoring stations and magnehelic pressure gauges to multiple resources for design and O&M guidance, the author points to recent projects and current wisdom to create a valuable resource.
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Managing Smoke In A Health Care Facility

The special nature of the occupants and activities in these facilities create special IAQ requirements, and the concerns only multiply when fire and smoke enter the picture.
By William E. Koffel, P.E., FSFPE
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The special nature of the occupants and activities in these facilities create special IAQ requirements, and the concerns only multiply when fire and smoke enters the picture. See how current codes and designs employ a combination of active and passive strategies, building on past approaches to minimize future incidents.
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A Study In Chilled Water System Retrofits

With fluctuating energy prices, Loma Linda University searched for a cooling solution that would benefit the sprawling campus. Three different thermal energy storage systems were analyzed to find the best fit.
By Shaw Gentry EIT and Lucas B. Hyman P.E., LEED
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Founded in 1905, Loma Linda University (LLU) in Loma Linda, CA, is a growing educational health-science institute and medical center.
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Editor's Note

Summer Changes

A new look, plus news worth looking up. Oh, and a lung in a box.
By Robert Beverly
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Does this layout make our butt look fat? Notice a little something different about us last month? We had too many items on the plate to mention it at the time, but June marked the debut of our new redesign.
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Online Exclusive

Using Control Charts To Monitor Room Temperature

By Scott Albert and Albena Iossifova
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In this tale of setpoint sleuthing, the team at Slippery Rock University digs hard into the data to discover why and where the old BAS strategy was going wrong. See what the measurements and math turned up for various spaces in terms of culprits and recommendations.
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Staying Dry & Comfortable With Liquid Desiccants

Let a scientist with experience both at the National Renewable Energy Laboratory and on the manufacturer side discuss the possibilities of a newer dehumidification technology within the framework of the same old moisture challenges.
By Dr. Phil Farese
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In the summer, conventional air-conditioning systems in buildings are challenged to meet peak humidity loads. Over time, buildings have reduced their heat (sensible) load, but have done less to reduce their moisture (latent) load. As a result, this moisture load can become too large for conventional air-conditioning systems to handle.
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Cover Story

Building On A Swedish Tradition

The American Swedish Institute looked homeward to plan for its future, using geothermal technology to achieve high-performance energy solutions in an urban setting.
By Craig Lemma and Scott Litchty, P.E.
One Comment
Reflecting a long-established Swedish commitment to environmental stewardship, the Nelson Cultural Center addition at the American Swedish Institute (ASI) in Minneapolis integrates several technically advanced sustainable features, including a high-efficiency geothermal heating and cooling system that reduces energy consumption by nearly 30 percent (based on an ASHRAE 90.1 baseline) while supporting the Institute’s diverse community programming.
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Chillers Past, Present and Future

A couple of industry pros weigh in on how past ‘best practices’ sometimes get in the way of current potential, and on where technology might point.
By Fred Berry, chiller solutions senior program manager, Johnson Controls and Adam Meddaugh, director of positive displacement chillers, Daikin-McQuay
6 Comments
We had an idea to try something different this month — invite chiller manufacturers to give us their insights on one of two topics. We invited them to either talk about common errors in project design/installation/O&M, with an eye toward helping readers get the intended performance out of their equipment. Or, they could write about what they see happening in this sector in the future. In a stroke of good luck, we had one response to each question. – Ed.)
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Calculated Conditioning: The IAQ Of UFAD

UFAD and displacement ventilation systems require accurate estimates to meet relative humidity requirements and ensure efficient operations. Take a look at a few design options, and contemplate the reader challenge at the end.
By Robert Bolin, P.E., HBDP, LEED Fellow and Andrew Reilman, P.E., HBDP, LEED AP BD+C
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Since their introduction in Europe in the 1950s, and their domestic rise in specification during the 1990s, UFAD and displacement ventilation systems promise significant energy savings as a direct result of a higher supply air temperature that yields an increase in the use of economizer or free cooling hours.
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ES Gallery: Snapshots & Systems

Check out highlights from projects featured in our magazine this year!
9/25/14 2:00 pm EDT

Test Anxiety? Learn How and When to Test Your Standby Generator

This webinar will discuss generator reliability, testing, and troubleshooting from a practical perspective and make recommendations for a comprehensive inspection and testing program.

Engineered Systems Magazine

Es August 2014 cover

2014 August

Check out the August 2014 issue of Engineered Systems, with features on UFAD systems, cloud services, and much more!

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