Articles by Paul Ehrlich, P.E.

BUILDING AUTOMATION

Upgrading VAV Boxes

DDC benefits are beyond question, although “repair vs. replace” is a judgment call.
VAV terminal units have been widely used for space comfort conditioning over the last 30 plus years.
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BUILDING AUTOMATION

Controls For VRF Systems

Incorporating these systems with BAS can prove to be a wise choice.
One of the most interesting new HVAC trends is the use of VRF systems
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BUILDING AUTOMATION

Impact Of ASHRAE 90.1 On Controls And BAS Design

As states adopt more stringent energy codes, here is what you need to know.
In an effort to improve energy efficiency for commercial buildings, ASHRAE, IES, ANSI, and the DOE have been working diligently to increase the stringency of state energy codes.
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BUILDING AUTOMATION

Controls & Occupancy

Existing sensor strategies and newer lighting tech continue the battle against wasteful energy use.
Much of the energy usage in a commercial building can be attributed to systems that are operating under the assumption that the building is “occupied.”
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Building Automation

Data Analytics

Buildings offer a multitude of valuable information, but it’s no good if you can’t find it.
Buildings contain a treasure trove of data. Information is available from a broad variety of systems from HVAC and electrical to utility usage.
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BUILDING AUTOMATION

Spring Tune-Up For Your BAS?

Chances are good your control system is not working to its potential. Here are some ways to fix that.
Each month in this column, we talk about the benefits of control systems and BAS.
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Building Automation

Making BAS Accessible — But Protected From Cyberattack

The Target hacking debacle is still under investigation, but there are lessons to be learned on protecting personal information.
Chances are you have heard about the data breach at Target that occurred late last year, in which customers’ information including credit card numbers were obtained through a cyberattack.
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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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Building Automation

Chiller Plant Control

While chilled water plants can range in complexity, the fundamentals are the same.
Chilled water plants tend to be one of the most energy intensive areas of a commercial building.
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