Mark Eatherton

System fluid volume revisited 
As winter approaches, the task of estimating the volume of fluid in a given hydronic system rears its head once again.
K.I.S.S. — Keep it sweetly simple 
Many people have their own interpretation of this acronym. Some say Keep It Simple Stupid. I prefer one I developed, which is Keep It Sweetly Simple. A perfect fit for hydronics.
What is the ‘point of no pressure change,’ and why should you care? 
During a recent code hearing, it was pointed out to me that the pressure at the PONPC will in fact change due to expansion and contraction of the working fluid, so the name is somewhat misleading.
Difference between circulators, pumps
Many industries suffer some of the same problems that our industry does when it comes to the jargon used by its tradesmen.
So you think you know radiant eh…. 
I talk to people on a daily basis about radiant heating and radiant cooling systems.
Non solid state control strategies, Pt. 2 
In last month’s article, we began to rediscover non-electric thermostatic radiator valves (TRV).
Non solid state control strategies 
Here we are today, with more computing power onboard even the lowliest of boilers than there was on the spacecrafts that circled the moon.
Hydronic certification becomes reality 
Many years ago, the Radiant Panel Association, predecessor of the Radiant Professionals Alliance, developed the first certification program for radiant installers and designers.
Educational opportunity from your Radiant Professionals Alliance
Tom is so convinced this is the learning opportunity of a lifetime that he is willing to give you a taste of what is covered. He is putting on a free demonstration Thursday, Feb. 4.
Announcing Series 19000 Professional Qualification Standard recognition by ANSI 
The RPA has been working with ASSE International to develop ASSE/IAPMO/ANSI Series 19000-2015 Professional Qualification Standards pertaining to the hydronic system installer and hydronic system designer certification program.
Piping methodologies for distribution systems — Pt. 2 
In last month’s article, we looked deep into the pipes of an old two-pipe gravity circulation system. We will now continue looking at the history and advances of these wonderful mechanical systems.
There’s a new codebook in town 
I’d like to take a short break from our regular programming to introduce you to the new codebook, the Uniform Solar Energy Hydronics Code (USEHC).
Distribution piping methodologies 
Having been involved in the pipe trades for over half of my life, I have had the opportunity to be exposed to almost every type of piping system.
RPA can help grow your business 
One of the primary functions of the Radiant Professionals Alliance (RPA) is to help our contracting members grow their business and make it flourish as much as possible.
What could possibly go wrong? Pt. — 4 
In the last column, we were talking about the need to look at the building plans as a “system” instead of looking at them from an individual component perspective. We are now continuing on with that conversation.

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