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Home » hydronics zone

Articles Tagged with ''hydronics zone ''

Expansion Tank Pressurization

Improper Air-side Pressurization ‘Wastes’ some of the Internal Volume
John Siegenthaler, PE
July 28, 2014

Having the proper air-side pre-pressurization prevents system water from entering the expansion tank, until the water begins expanding due to heating. 


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Blame the Kids: The Cause of Your Mechanical Malfunctions

Kids do the Darndest Things, Don’t They?
Dan Holohan
June 23, 2014

It took six firefighters to get the kid out of the duct, and Mama got older. Much older.


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My First Online Teaching Experience

I Often Find Myself Talking to My Computer
John Siegenthaler, PE
May 26, 2014

Last fall, I taught my first online course dealing with designing hydronic heating systems. The course was titled “Mastering Hydronic System Design.” It was a collaborative effort between HeatSpring Learning Institute, BNP Media’s CE Campus, and myself.


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When I’m 64: Knowledge is the Greatest Gift

Knowledge is the Greatest Gift You Can Give
Dan Holohan
April 28, 2014

I turned 64 in January, and if I knew I was going to live this long, I would have taken better care of myself. 


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Contrasting Rules of Thumb, Calculations

Using Accurate Numbers is the Professional Thing to Do
John Siegenthaler, PE
March 17, 2014

If you’re using a calculator, spreadsheet, or other computational tool, you should use the most accurate numbers possible. It’s just part of being a professional.


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My Day as a Potted Plant

A Tale of Corporate Misunderstanding and Embarrassing New Suits
Dan Holohan
February 24, 2014

The year I served as the potted plant, Sheraton was building a hotel out on Lawn Guyland. This is where things got tricky. 


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Heat Transfer: Nature Versus Math

Formulas and Assumptions Don’t Always Predict what Happens
John Siegenthaler, PE
January 27, 2014

The following formula has been around the North American hydronics industry for a long time: Btuh = 500 x gpm x delta T. It can be used to estimate the rate of heat transfer into or out of a device that has a stream of water flowing through it at a known flow rate, and with a measured temperature change between the inlet and outlet of that water stream.


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You Don’t Need a Weatherman

You Do Need Knowledge of the Quirks of Older Heating Systems
Dan Holohan
December 16, 2013

Unless you get an older steam system working as it should be working, sensors and software will just let you know that something is wrong.


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Missing: Self Buffering & Low Head Loss

Considering Circulators and Head Loss in Modern Boiler Systems
John Siegenthaler, PE
November 18, 2013

In newer modulating/condensing boilers, many of their heat exchangers had to sacrifice two very desirable qualities in the interest of being small and light.


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A Grand Punch in the Mouth

Lessons Learned from the Great Recession and Hurricane Sandy
Dan Holohan
October 28, 2013

As the noted philosopher Mr. Michael “Iron Mike” Tyson once said, “Everyone has a plan, ’til they get punched in the mouth.”


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