Understanding Primary Secondary Pumping Part 2: Mixing Temperatures (and Flows!) in a Hydronic System

By Chris Edmondson

What happens in a pipe when water of two different temperatures (and perhaps different flow rates) merge? 

There’s a pretty straightforward formula that tells you exactly what the resultant water temperature will be. In this blog, we’ll go over that calculation, as well as take a closer look at how blended temperatures

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Understanding Primary Secondary Pumping Part 1: Behold the Humble Tee!

Are you involved in the design or installation of hydronic systems?  Do you anticipate becoming involved?

 If you answered yes to either of these questions, this blog series on primary/secondary pumping will interest you.  If you are a hydronic’s veteran, feel free to skip the first few blogs in the series – they may be too much of a review.  Better yet, pass them onto a junior associate and

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Designing Commercial Sewage Lift Stations Part 7: Elevator Pits

By Chris Edmondson

Sump pumps aren’t just for plumbing applications.  Did you know that most elevator pits also require sump pumps?  ASME 17.1 – 2007 states that any elevator that is provided with Firefighters’ Emergency Operation

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No More Constant Speed Pressure Boosting Under ASHRAE 90.1 - 2010

By Mark Bingham

“Constant speed pressure boosters are DEAD and GONE TO HEAVEN!”

That was the prevailing message recently from Chris Edmondson, CEO of JMP, as he briefed the folks here at about the upcoming mandatory changes under SECTION 10.4 of the new ASHRAE 90.1 – 2010.

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Designing Commercial Sewage Lift Stations Part 6: A Sizing Example

By Chris Edmondson

 Over the last several weeks we’ve talked about many aspects of designing a commercial sewage lift station, from flow rates to components.  In this blog, we’re going to work through a really simple sizing example. Let’s say we are sizing a sewage station for a retirement facility made up of primarily independent living units. 

 

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