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Home » Topics » Radiant & Hydronics Columns

Radiant & Hydronics Columns
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Dan Holohan: Crank it down?

A quick guide to the three most profitable words in my vocabulary.
Dan Holohan
April 10, 2019

In 1989 when we started our business, The Lovely Marianne asked me what I was going to do to make money for her and our four daughters. I told her I was going to write books, but it would take some time to do that.


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John Siegenthaler: A synergistic system

True professionals look for synergistic opportunities when designing hydronic systems.
John Siegenthaler 200x200 author headshot on a white background.
John Siegenthaler, P.E.
April 8, 2019

One of the “delights” of designing hydronic systems is looking for synergistic opportunities, where one device provides multiple functions or benefits that would otherwise require two or more separate devices.


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Dan Holohan: Why my hair is brown

It pays to trust the professionals.
Dan Holohan
March 12, 2019

I’m 69 years old and my hair is as brown as it was when I was a teenager. A bit of it, mostly around my ears and the back of my neck, sneaks in as gray, but some Russian barber just buzzes those stray hairs away and I’m back to being a young fella again. I like the Russian barbers.


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John Siegenthaler: 5 more products the hydronics industry needs

These products would help fill needs within the hydronics market.
John Siegenthaler 200x200 author headshot on a white background.
John Siegenthaler, P.E.
March 11, 2019

In last month’s Hydronics Workshop column I described five devices that would, in my opinion, improve and expand the North American hydronics industry.  Here’s my “wish list” from that column:


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Dan Holohan: Pricing is Perception

Who doesn’t like a terrific deal?
Dan Holohan
February 26, 2019

We live on The Isle of Long, which means that if you throw a rock you’ll hit a large, chrome-plated diner. These palaces of gastronomy have just about anything you could want for any meal of the day and the food arrives on the table seconds after you decide what you want, and often even before.


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John Siegenthaler: 5 products the hydronics industry needs

These products would help fill needs within the hydronics market.
John Siegenthaler 200x200 author headshot on a white background.
John Siegenthaler, P.E.
February 26, 2019

All companies that supply hydronic heating hardware to the North American market strive to offer products that are currently in demand. Some even look farther down the road, anticipating where the market is headed.


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Ray Wohlfarth: The case for 2 psig

Ray Wohlfarth
February 12, 2019

What is the proper pressure setting for a comfort-heating steam boiler?


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Ray Wohlfarth: 6 lessons learned about boiler water treatment

I hope the lessons I have learned over the years will help you in the boiler room.
Ray Wohlfarth
January 7, 2019

My technical boiler books all use the “lessons learned” theme, and the following are the lessons I have learned about boiler water treatment.


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Dan Holohan: What’s in it for me?

Potential employers want to know what you bring to the table.
Dan Holohan
January 4, 2019

In 2016, when I retired from speaking and traveling just about everywhere, I got involved with the General Society of Mechanics and Tradesmen of the City of New York. The society has been meeting regularly since 1785. They opened, and continue to operate, the second-oldest membership library in New York City.


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John Siegenthaler: How to use a variable-speed circulator for boiler protection

Any boiler can become a condensing boiler under the right conditions.
John Siegenthaler 200x200 author headshot on a white background.
John Siegenthaler, P.E.
January 4, 2019

All boilers that burn hydrocarbon fuels (natural gas, propane, oil, wood) produce water vapor as a byproduct of combustion.


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