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Articles Tagged with ''standards''

Plenum Requirements For Egress Corridors In Health Care Environments

July 1, 2011
Incorporating a plenum can have its design advantages, but corridors serving adjoining areas of health care occupancies are prohibited from being used for a portion of an air supply, air return, or exhaust air plenum. This article and its illustrations can strengthen your grasp of the related NFPA code details and exceptions so you can design and ventilate properly for this special population.
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Seismic & Wind Concerns

May 5, 2011
Earthquakes and strong gusts are threats in the physical world that creep into the HVAC design world of isolators, supports, and special louver considerations. Furthermore, a new legal world in terms of codes, insurance, and liability can leave inattentive engineers, owners, and manufacturers quaking in their boots. Read on to stay safe in more ways than one.
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MAXON - Don't Operate Unaware

April 5, 2011
Gain Insight into Valve Performance
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IAQ: Florida's Teachable Moment

March 3, 2011
An engineer with the 9th-largest school district in the United States writes about the IAQ testing and final report that his district commissioned. From offices to classrooms to cafeterias and restrooms, the monitoring was extensive. Read the results and some author comments about acceptable IAQ in schools, the possibility of overdoing fresh air, and the associated costs.
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Editor's Note: Aftershocks: Don't Be Swayed

March 1, 2011
How to turn disaster into awareness into a difference the next time?
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Boiler Safety On The Front Burner

February 1, 2011
Between the limits of enforcement and the potential sources of trouble, there’s a lot of room for something to go wrong with a boiler system. Consider the options for regular inspections, testing, and training to steer your facility clear of extra costs, outages, or much worse.
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Behind The Change In ASHRAE/ASHE Standard 170

February 1, 2011
Review the work that engineers and clinicians put into creating an amendment to the standard for relative humidity in the operating room and other spaces. The goal was to see whether it was possible to adjust rh thresholds without affecting patient health, but the associated potential equipment savings may make facility budget directors feel the best of all.
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Tommorrow's Environment: The Hospital Acquired Infection Foundation

January 1, 2011
We all need to do better in this design/build/O&M business.
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Refrigeration Update

January 1, 2011
The phaseout of ozone-depleting refrigerants marches on. Take a look at what is and isn’t allowed, and when.
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Warming Up To Snowmelt Technology

December 1, 2010
From sidewalks to hospital entrances and helipads, these systems are becoming a more common part of a project’s mechanical infrastructure. Examine differences between ASHRAE’s old and updated classifications, then review design considerations such as heat of evaporation, heat loss to the atmosphere, and back and edge losses. Tubing, spacing strategies, and controls round out the primer.
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