Top 5 Consulting-Specifying Engineer articles, November 24-30: Sizing and selecting pumps, specifying a multi-mode UPS, selective coordination answers, more

Articles about sizing and selecting pumps and circulators, specifying a multi-mode UPS, selective coordination answers, fire and life safety trends, and flexible and sustainable electrical systems were Consulting-Specifying Engineer’s five most clicked articles from last week, November 24-30. Were you out last week? Miss something? You can catch up here.


Consulting-Specifying Engineer Top 5 most read articles online, for Nov. 24-30, covered sizing and selecting pumps and circulators, specifying a multi-mode UPS, selective coordination answers, fire and life safety trends, and flexible and sustainable electrical systems. Link to each article below.

1. Sizing, selecting pumps and circulators

By making correct pump and piping selections, a hydronic system can operate at or near peak efficiency, avoiding cavitation and vibration. Here's a look at relevant codes and best practices. 

2. Specifying a multi-mode UPS in data centers

Engineers should consider lifecycle cost and energy efficiency models for evaluating data center uninterruptable power supply (UPS) systems. 

3. Selective coordination: Your questions answered

NFPA 70: National Electrical Code defines selective coordination. Questions not addressed in the Critical Power: Selective Coordination webcast are answered here by Syed Peeran, PE, PhD, CDM Smith, and Rick Reyburn, PE, JBA Consulting Engineers. 

4. Fire and life safety: Six trends that matter to engineers

Consulting-Specifying Engineer sees the following as the six most important high-level findings impacting the fire and life safety industry today. 

5. Flexible, sustainable electrical systems

Current building codes and standards allow designers to build flexibility into the electrical system. 

The list was developed using CFE Media's web analytics for stories viewed on, November 24-30, for articles published within the last two months.

- Chris Vavra, production editor, CFE Media,

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