Items Tagged with 'Dan Holohan'

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John Siegenthaler wins industry award

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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.
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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.
By Dan Holohan
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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.
By Dan Holohan
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 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.
By Dan Holohan
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 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
By Dan Holohan
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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.
By Dan Holohan
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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.
By Dan Holohan
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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.
By Ray Wohlfarth
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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?
By Dan Holohan and Dan Holohan
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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

PM has featured so many great plumbing service trucks! See plenty of them here in our Truck Of The Month Archives page. Are you proud of your truck? Go to our Truck of the Month page to find out how your service truck could be chosen!

9/16/14 9:00 am PDT

Free Webinar: Acoustical Isolation

HOLDRITE will be hosting a free webinar for Acoustical Isolation on Tuesday, Sept. 16, 2014.

Plumbing and Mechanical

July 2014

2014 July

In the July issue of PM Magazine, read about the steps the president of MacGregor Plumbing is taking to help the next generation of plumbing professionals enter the industry. Learn about the Hartford Loop, how CPVC pastic piping works in multifamily construction and training mistakes to avoid to become a more effective trainer. Find out who is this month's Truck of the Month, read the latest tool tips and discover the latest products in the plumbing industry.
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2014 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

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Truck of the Month

Truck of the month

Are you proud of how your service truck looks? Do the graphics give people whiplash as they drive by? Have your calls increased because people remember your truck — and your company name? If so, we’d like to see it, too! Click here to find out how your service truck could be chosen as PM's Truck of the Month.

 

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