Norm Hall
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February 3, 2020
OK. I get it! Parallel pumping is a design technique I should review on most of my projects where first cost and energy cost are... READ MORE
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HVAC Hydronic System: Parallel Pumps and Cost
Norm Hall
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January 27, 2020
Reduced cost is often viewed as the reason parallel pumping exists as a design option for engineers. In today’s hydronic heating and cooling systems, we... READ MORE
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Hydronic Pump Energy: Motor & VFD Efficiency – How Low Can You Go?
Norm Hall
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January 20, 2020
I’m in the middle of the series of blogs on parallel pumping. We can’t ignore the efficiency of variable frequency drives and motors when looking... READ MORE
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HVAC Hydronic System: Parallel Pumps and Standby Capacity
Norm Hall
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January 13, 2020
Giving up the 100% standby pump is often the major concern when using parallel pumping strategies for hydronic heating and cooling systems. This strategy... READ MORE
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HVAC Hydronic System: Controlling Parallel Variable Speed Pumps
Norm Hall
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January 6, 2020
The historical view of parallel pumping was to make sure all the staging points landed on the single constant speed pump curve. This avoided... READ MORE
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HVAC Hydronic System: Parallel Pump Operation and Curves
Norm Hall
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December 30, 2019
Parallel pumping in hydronic systems can save energy and construction capital costs. Today we continue the series on parallel pumping where we look at the... READ MORE
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Parallel Pumping: What is it and Why do it
Norm Hall
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December 23, 2019
Most hydronic heating and chilled water systems end up with one operating pump and one 100% standby pump. It is easy to understand, and the... READ MORE
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HVAC Hydronic System Variable Speed Pump Operation
Norm Hall
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December 16, 2019
I am beginning a series on parallel staged variable speed (VS) pumps. As I write this series, it is important to understand and refer to... READ MORE
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