Items Tagged with 'Dan Holohan'

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John Siegenthaler wins industry award

At the AHR Expo in New York last week, Robert Bean presents the Carlson-Holohan Industry Award of Excellence to John Siegenthaler.


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Siegenthaler, Holohan to headline PM LIVE!

John Siegenthaler and Dan Holohan will present educational sessions at PM LIVE! during the 2014 AHR Expo.

PM Hydronics Editor John Siegenthaler and longtime columnist Dan Holohan will present educational sessions Jan. 22, 2014, at PM LIVE! during the AHR Expo in New York City.


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Perspectives from the front

The tale of Quincy, Mass., and its energy costs.

Each Thursday morning, I send a free enewsletter to more than 5,000 opt-in subscribers. It usually contains seven links to interesting stories (some of which even have to do with heating) along with my brief musings. I do this because I am curious by nature, love to share and have no life.


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You don’t need a weatherman

You do need knowledge of the quirks of older heating systems.

 I was chatting with an engineer the other day. She called to ask me some questions about old steam-heating systems, particularly those of the New York City variety.  


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A grand punch in the mouth

Lessons learned from the Great Recession and Hurricane Sandy.

 I’d like to begin with a big shout-out to that noted philosopher, Mr. Michael Tyson, who once said, “Everyone has a plan, ’til they get punched in the mouth.”


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Understanding pump pressure that’s available vs. the required pressure

Not pumping so hot

I was lucky to have had as one of my teachers the late, great Gil Carlson.  


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Early radiant heating systems

From Roman hypocausts to Chinese kangs to Levittown to the invention of PEX.

Each morning, when I sit at my desk, I give a moment’s thought to the broken copper pipe buried in the concrete slab just below my feet. 


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Radiator Cover-Up

A simple way of killing convection and radiation.
One of my yellowed heating textbooks has a wonderful drawing of a Victorian radiator that has what looks like a teapot cozy over it.
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Steam, the Original ‘Bad Boy’

Don’t approach steam like a hot water system.
Steam systems have the reputation of being the “bad boy” of the industry and I believe it may be unfounded. Many contractors will suggest replacing the steam system with a new system but it may be fiscally unrealistic to do so.
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We Put the Fish in Efficiency

What exactly is higher efficiency higher than?
My friend, Jenni, was visiting from Scotland and had never been to Central Park, so I took her there for a long walk, a ride on the carousel and some wine at the boathouse. We sat outside.
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2014 Truck of the Month

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2014 December

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2015 National Plumbing & HVAC Estimator

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