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Home » Topics » Columnists » Dan Holohan

Dan Holohan
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Dan Holohan covers a wide breadth of hydronic heating-related topics but specializes in steam heating.

ARTICLES

buildings that have tenants

Dan Holohan: Multifamily heating: Who pays?

Divvying up the bill
Holohan
Dan Holohan
December 9, 2022
No Comments

There’s long been talk about how to divvy up the heating expenses in buildings that have tenants. Should each tenant have their own meter? Their own boiler? Boilers are a lot smaller than they used to be, right?


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new perspectives can make history

Dan Holohan: Seeing the word in a different way

Embracing new perspectives can make history.
Holohan
Dan Holohan
October 10, 2022
2 Comments

I was listening to James Trane the other day. He was speaking from Chicago in 1902, telling me that his system of steam heating using small pots of mercury was the best way to go.


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calculating

Dan Holohan: What I learned during the 1930s

Cheap matters.
Holohan
Dan Holohan
August 8, 2022
No Comments

I was, I’m sure, not even in the minds of my someday-to-be parents, but I’ve spent a lot of time in that decade of the Great Depression nonetheless. I like to think of them as teenagers as they wondered what was to be. They truly were the Greatest Generation.


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The magic of the simple air vent
HEATING HELP

Dan Holohan: The magic of the simple air vent

You never know what knowledge you’ll discover by reading old literature.
Holohan
Dan Holohan
June 10, 2022
No Comments

 recently came across the December 1924 issue of Popular Science magazine. Reading stuff like that always makes me feel like I have a time machine.


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Adventures in pumping
Heating Help

Dan Holohan: Adventures in pumping

The evolution of pumps, circulators and radiant heat.
Holohan
Dan Holohan
February 9, 2022
3 Comments

I read somewhere that the most prevalent machine in the world is the electric motor. I thought about that for a while and it made sense. Just look around. But then I began to wonder what the second-most prevalent machine in the world is. Turns out it’s the pump!


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Marbles and ghosts

Dan Holohan: Marbles and ghosts

Visual thinking is key to understanding hydronic systems.
Holohan
Dan Holohan
December 8, 2021
One Comment

I worked for a manufacturers’ rep when I was first learning about hydronics. A guy I worked with was 15 years older than me. He knew that I had absolutely no training as an engineer so he took a different tack with my education.


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Steam and hot-water heating

Dan Holohan: The two sides of hydronics

A history lesson on the two profitable sides of hydronic heating.
Holohan
Dan Holohan
October 7, 2021
2 Comments

Steam and hot-water heating joined hands a long time ago to make up what we today call “hydronics.” 


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missing puzzles sketch

The subtlety of steam

Help your customer be a better troubleshooter.
Holohan
Dan Holohan
August 5, 2021
No Comments
You may think steam is just, well, steam. But there’s a lot more going on when it comes to steam heating a building. A bit of knowledge about the hot stuff will make you a better troubleshooter when it comes to what’s heating many of our older buildings. So let me help you look like a genius.
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Dan Holohan

Dan Holohan: How to size a condensate pump

Some advice: Always try to see the system.
Holohan
Dan Holohan
June 8, 2021
One Comment

Most manufacturers rate their condensate pumps in square feet EDR. 


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Dan Holohan

Dan Holohan: What is heat?

If you want to be a heating expert, you first have to understand what heat is.
Holohan
Dan Holohan
April 12, 2021
No Comments

Before I retired in 2016, I’d get a lot of calls from lawyers who wanted to hire me to be an expert witness at a trial. 


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More Articles Tagged with 'Dan Holohan'
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