Miles Ryan, P.E., writes a monthly column in Engineered Systems Magazine on Building Commissioning. Read February’s column below: Recommendations from commissioning providers to owners, designers, contractors, etc., often are validated by field experience. For credibility purposes, having lived those experiences yourself is ideal. However, much can be learned from others’ hard taught lessons as well.…

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Miles Ryan, P.E., writes a monthly column in Engineered Systems Magazine on Building Commissioning. Read January’s column below: The commissioning of plumbing systems is not in every project’s scope, but when it is, the domestic hot water (DHW) system is often the first system included. Often, the DHW system includes recirculation piping and an associated…

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Miles Ryan, P.E., writes a monthly column in Engineered Systems Magazine on Building Commissioning. Read December’s column below: Resiliency has been a buzz word for the past few years in the Air Force. It is the ability to bend, but not break, when something goes wrong. This term is used in a variety of contexts,…

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Miles Ryan, P.E., writes a monthly column in Engineered Systems Magazine on Building Commissioning. Read November’s column below: During some projects, commissioning providers may have limited chances to have our recommendations heard. I have found that if your recommendation includes challenging the Big Mistake1 often seen with a demand-controlled ventilation (DCV) sequence for air handing…

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Miles Ryan, P.E., writes a monthly column in Engineered Systems Magazine on Building Commissioning. Read October’s column below: Demand Controlled Ventilation (DCV) is a control strategy which aims to vary the amount of ventilation air a system provides a space based on the real-time ventilation requirements (i.e. the ventilation demand) of the space. The term…

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Miles Ryan, P.E., writes a monthly column in Engineered Systems Magazine on Building Commissioning. Read September’s column below: In August’s column, I discussed three-way control valves, their associated bypass pipes, and the importance of a balancing valve being located within the bypass pipe. Such balancing valves are needed to throttle flow. If missing, or left…

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Miles Ryan, P.E., writes a monthly column in Engineered Systems Magazine on Building Commissioning. Read August’s column below: Bypass pipes, accompanied by a three-way control valve, are often seen in hydronic systems at both served loads (e.g., reheat coils) as well as primary equipment (e.g., cooling towers). Reasons for utilizing a three-way control valve and…

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Abstract: Maintaining a solid understanding of how common HVAC systems are controlled is essential to effectively troubleshooting them. It is also necessary for optimizing the energy performance of such systems. Improving the knowledge base of HVAC control sequences throughout the Department of Defense, for these purposes, was the driving force behind the resurrection of the…

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Abstract: Maintaining a solid understanding of how common HVAC systems are controlled is essential to effectively troubleshooting them. It is also necessary for optimizing the energy performance of such systems. Improving the knowledge base of HVAC control sequences throughout the Department of Defense, for these purposes, was the driving force behind the resurrection of the…

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Abstract: Maintaining a solid understanding of how common HVAC systems are controlled is essential to effectively troubleshooting them. It is also necessary for optimizing the energy performance of such systems. Improving the knowledge base of HVAC control sequences throughout the Department of Defense, for these purposes, was the driving force behind the resurrection of the…

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