ASHRAE 90.1-2010/2013: Impact on Variable Speed Pump Control in Chilled Water Systems

ASHRAE 90.1-2010/2013: Impact on Variable Speed Pump Control in Chilled Water Systems

Today we begin a series of blogs exploring modern variable speed pump control. While we have written about variable speeding pumping in the past, we believe that the increasing presence of variable speed systems, along with the rapid evolution of control options, warrants a comprehensive look at variable speed pump control as a...

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New Pump Efficiency Standards Part 2: The Pump Efficiency Metric (PEI)

New Pump Efficiency Standards Part 2: The Pump Efficiency Metric (PEI)

Now that the U.S. Department of Energy (DOE) has published the first ever Energy Conservation Standards for Pumps, let’s take a look at some of the finer details of that standard, starting with the associated terminology and what it means...

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NYC Adopts ASHRAE Legionella Standards

NYC Adopts ASHRAE Legionella Standards

New York City wasted no time adopting portions of the recently published Standard 188-2015, Legionellosis: Risk Management for Building Water Systems.  This is following the recent outbreak of... 

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ASHRAE Passes Standard 188-2015, Legionellosis: Risk Management for Building Water Systems

Why has ASHRAE decided to address balancing in a standard that is written for the purpose of Legionella prevention? The reason has to do with domestic hot water recirculation systems – particularly large systems with multiple returns coming back to the boiler. If these return lines are not balanced it is possible that...  

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Hydronic Balancing Part 1: The Standards and Driving Force Behind the New Requirements

Balancing plays a critical roll in the performance of any hydronic heating and cooling system. For that reason alone, ASHRAE has made hydronic balancing a non-negotiable stop on the road to compliance with ASHRAE 90.1-2010 (or 2013), starting with this requirement....
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