This website requires certain cookies to work and uses other cookies to help you have the best experience. By visiting this website, certain cookies have already been set, which you may delete and block. By closing this message or continuing to use our site, you agree to the use of cookies. Visit our updated privacy and cookie policy to learn more.
This Website Uses Cookies
By closing this message or continuing to use our site, you agree to our cookie policy. Learn More
This website requires certain cookies to work and uses other cookies to help you have the best experience. By visiting this website, certain cookies have already been set, which you may delete and block. By closing this message or continuing to use our site, you agree to the use of cookies. Visit our updated privacy and cookie policy to learn more.
PM Engineer
search
cart
facebook twitter linkedin youtube
  • Sign In
  • Create Account
  • Sign Out
  • My Account
PM Engineer
  • EMAGAZINE
    • eMagazine
    • Archive Issue
    • Contact
    • Advertise
    • Subscribe
  • MARKET SECTORS
    • Green Plumbing
    • Green Mechanical Systems
    • Codes
    • Fire Protection
    • Radiant/Hydronics
    • Solar Thermal/Geothermal
    • Bath & Kitchen
    • Water Treatment
    • Technology
  • eNEWS
    • pme eNewsletter Archives
    • Supply House Times e-news
    • Radiant & Hydronics eNews Archives
    • Bath & Kitchen Pro eNews Archives
    • Subscribe to Plumbing Group eNewsletters
  • COLUMNS
    • Julius Ballanco
    • John Siegenthaler
    • Ethan Grossman
    • Christoph Lohr
    • David Dexter
    • James Dipping
    • Fire Protection
    • Dave Yates
    • Dan Holohan
    • Ray Wohlfarth
    • Editor's Note
    • Guest Editorial
  • MEDIA
    • pme Network Videos
    • PME AHR Expo 2022 Videos
    • eBooks
    • Interactive Spotlights
    • Photo Gallery
    • Podcasts
    • Webinars
    • Polls
  • PRODUCTS
  • RESOURCES
    • White Papers
    • Radiant Comfort Report
    • Fire Protection & Design Special Section
    • NSF Design Special Section
    • PVF Outlook
    • History of Plumbing
    • Industry Calendar
    • Custom Content & Marketing Services
    • Classified Ads
    • Market Research
    • Bookstore
    • Continuing Education
  • DIRECTORIES
    • B.I.G. Book
    • Rep Locator
Home » Topics » Columnists » Dan Holohan

Dan Holohan
Dan Holohan RSS FeedSubscribe

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

ARTICLES

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!


Read More
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.


Read More
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.” 


Read More
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.
Read More
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. 


Read More
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. 


Read More
Dan Holohan

Dan Holohan: What’s in a name?

Questioning the plumbing industry’s lexicon.
Holohan
Dan Holohan
July 31, 2020
One Comment

We have so many names for common things and tools that we use in this business; and because I have way too much time on my hands, I started wondering how those names came to be. 


Read More
Dan Holohan

Dan Holohan: Let's talk job politics

Making sure everybody is on the same page is advice that will go a long way.
Holohan
Dan Holohan
April 8, 2020
No Comments

I got an email from the customer service manager at a well-known boiler manufacturer whose name I will keep to myself. 


Read More
Dan Holohan

Dan Holohan: How one missing pipe can make all the difference

Holohan
Dan Holohan
October 23, 2018
No Comments

We go to the places where we’re comfortable when troubleshooting.


Read More
Dan Holohan

Dan Holohan: Work ethic goes beyond the timecard

Holohan
Dan Holohan
September 30, 2018
No Comments

You may never understand how important going the extra mile means.


Read More
More Articles Tagged with 'Dan Holohan'
Subscribe For Free!
  • eMagazine Subscription
  • eNewsletters
  • Online Registration
  • Subscription Customer Service

More Videos

Popular Stories

pump system design, setup and maintenance

Top 5 pump system myths debunked

Formic acid corrosion, erosion

Dave Yates: Formic acid corrosion, erosion

Decarbonization and electrification

Julius Ballanco: Decarbonization and electrification — are we there yet?

Events

December 30, 2030

Webinar Sponsorship Information

For webinar sponsorship information, visit www.bnpevents.com/webinars or email webinars@bnpmedia.com.

View All Submit An Event

Poll

Professional Development Hours

How do you earn Professional Development Hours each year for your license?
View Results Poll Archive

Products

History of Plumbing (ebook)

History of Plumbing (ebook)

See More Products

pme replocator

Get our new eMagazine delivered to your inbox every month.

Stay in the know on the latest plumbing, piping, hydronic and fire protection trends.

SUBSCRIBE TODAY
  • Resources
    • List Rental
    • Reprints
    • eNewsletters
    • Contact Us
    • Editorial Submissions
  • Want More?
    • Subscribe
    • Industry Links
    • Connect
    • Survey And Sample
  • Plumbing Group
    • Plumbing & Mechanical
    • PM Engineer
    • Supply House Times
  • Advertise
    • Plan For 2022!
    • Advertise
  • Privacy
    • PRIVACY POLICY
    • TERMS & CONDITIONS
    • DO NOT SELL MY PERSONAL INFORMATION
    • PRIVACY REQUEST
    • ACCESSIBILITY

Copyright ©2022. All Rights Reserved BNP Media.

Design, CMS, Hosting & Web Development :: ePublishing