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Home » Authors » Dan Holohan

Articles by Dan Holohan

Dan Holohan

Finding Value in Cardboard Apps

Calculating Measurements Since 1867 — No Battery or Signal Required
Headshot holohan dan
Dan Holohan
June 8, 2015
No Comments

I think about how many hands must have touched these things before they came to me, how many jobs they helped size, and how many problems they helped solve. Think of all the time they saved — and not one of them needed a battery.


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Dan Holohan

Hydronics Zone: Invisible Tenants vs. Payback

Help Owners Understand Fuel Savings Via Lower Heat Complaints, Not Payback
Headshot holohan dan
Dan Holohan
March 16, 2015
No Comments

Little kids aren’t the only ones who think like this. People not of this trade often think in a different way than we do. And, sometimes, they even think in a better way.


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Dan Holohan

Get Real — Get Hydronic Heat

Attention to Engineering and Design May Save Generations of Comfort Grief
Headshot holohan dan
Dan Holohan
January 19, 2015
No Comments

My daughter Erin, along with her three sisters, grew up listening to me talk nonstop about hydronic heating. Erin recently bought a house with a furnace.


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Pressure

High Pressure Always Goes to Low Pressure

Without a Difference in Pressure, There Can Be No Flow
Headshot holohan dan
Dan Holohan
August 25, 2014
No Comments

Since heat travels on flow like a passenger on a train, where there is no flow, there is no heat. And it’s going to look just like an air problem. Which it’s not.


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Blame the Kids: The Cause of Your Mechanical Malfunctions

Blame the Kids: The Cause of Your Mechanical Malfunctions

Kids do the Darndest Things, Don’t They?
Headshot holohan dan
Dan Holohan
June 23, 2014
No Comments

It took six firefighters to get the kid out of the duct, and Mama got older. Much older.


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Dan Holohan

When I’m 64: Knowledge is the Greatest Gift

Knowledge is the Greatest Gift You Can Give
Headshot holohan dan
Dan Holohan
April 28, 2014
No Comments

I turned 64 in January, and if I knew I was going to live this long, I would have taken better care of myself. 


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Dan Holohan

My Day as a Potted Plant

A Tale of Corporate Misunderstanding and Embarrassing New Suits
Headshot holohan dan
Dan Holohan
February 24, 2014
No Comments

The year I served as the potted plant, Sheraton was building a hotel out on Lawn Guyland. This is where things got tricky. 


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Thermisters are temperature-sensitive resistors. They can be set to sense the outdoor temperature and measure when steam has filled the pipe at that point. The unit is designed to ensure that steam is everywhere in the system.

You Don’t Need a Weatherman

You Do Need Knowledge of the Quirks of Older Heating Systems
Headshot holohan dan
Dan Holohan
December 16, 2013
No Comments

Unless you get an older steam system working as it should be working, sensors and software will just let you know that something is wrong.


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An overhead view of Hurricane Sandy's wreckage at Howard Beach in New York.

A Grand Punch in the Mouth

Lessons Learned from the Great Recession and Hurricane Sandy
Headshot holohan dan
Dan Holohan
October 28, 2013
No Comments

As the noted philosopher Mr. Michael “Iron Mike” Tyson once said, “Everyone has a plan, ’til they get punched in the mouth.”


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The first steam digester, invented by Denis Papin, was designed to extract fat from animal bones using steam.

A History of Steam Pressure Relief Valves

Who Truly Gets Credit for the Invention of the Steam Pressure Relief Valve?
Headshot holohan dan
Dan Holohan
August 12, 2013
No Comments

In 1905, a boiler in a Boston shoe factory blew up, traveled a great distance through the air, and landed, with delightful justice, in the front yard of the operating engineer’s house. Think it got his attention?


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