Items Tagged with 'VAV'

ARTICLES

Lab Results: Big (And Sometimes Fewer) Changes

When you have to individually go verify whether 128 air curtains meant to ensure air balance in the original design’s branch ductwork are still there or not, you’re not having an easy time of it.
One of the worst-performing buildings I’ve had the pleasure to study was a 375,000-sq-ft laboratory building at a Midwest university.
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Building Automation

Controls Optimization: No Longer Optional

Updated codes continue the push for better controls work as high performance edges further into the mainstream.
At one time, it might have been acceptable to view controls as a “necessary evil” with little attention given to the details of design including sequences and commissioning
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Hospital Retrofits For Energy Efficiency

How many health care facilities are limping along in terms of mechanical performance but could be running better than ever with one committed round of treatment?
Our BAS columnist makes a house call to prescribe one method of applying retrofit expertise, including the success story of a hospital with mysteries or maladies that required attention in VAV and chillers, air handling strategies, OR ventilation, and beyond.
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Commissioning

Unsampled Systems

Choosing not to sample every system can be a gamble, but here are some ways to lower your risk.
Over the past two months, this column has addressed the issue of sampling systems for field functional performance testing
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Commissioning

Functional Performance Test Sampling

So you’ve decided on your sample size. What next? What happens when a system failure is found?
Last month, this column addressed the need for (and philosophy behind) sample testing certain systems when 100% functional performance testing (FPT) is impractical from a time and/or budget perspective.
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Commissioning

Functional Performance Test Sampling

Testing it all typically isn’t an option. How to determine what (and how many) to check?
In the standard commissioning process, there are two primary technical activities that occur on site at the end of construction and prior to systems acceptance by the owner.
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Building Automation

DDC Or Pneumatic?

Energy savings isn’t the only factor when considering a controls retrofit.
Much of our work involves energy studies and retrofits to commercial buildings.
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Building Automation

Data Centers and VAV Design Opportunities

Read about various examples — from a 40,000-sq-ft raised-floor environment to a 5,000-sq-ft facility within a facility — to get a good view of the battlefield and make your next campaign against heat and inefficiency a little smarter.
The range of HVAC design options associated with the various types of data centers has expanded and evolved over the past 30 years in order to keep pace with the wide array of server transformations and deployment strategies.
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Trend Analysis Summary

One more case where all seems fine … but isn’t.
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Failed BAS: Unexpected and Unknown Results

Are you in a game of HVAC hide and seek that you don’t know you’re in?
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2014 September

Check out the September 2014 issue of Engineered Systems, with features on radiant panels, refrigerant flow systems, and much more!

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Tomorrow's Environment Podcast

This series from longtime columnist and chronic forward-thinker Howard McKew covers a lot of ground -- from retrocommissioning to systems training, on toward checklists for drawings and tips for meeting minutes. Click HERE to be taken to the podcast page!

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