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Home » Topics » Columnists

Columnists
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The industry’s best lineup of expert columnists including: Julius Ballanco, Dan Holohan, John Siegenthaler, Christine Swanson and Morris Beschloss.

Topics

John Siegenthaler

John Siegenthaler gives a technical view of solar thermal systems.

Misty Guard

Column brings expertise in codes and standards, governmental rulemakings, product compliance and more.

David Dexter

Todd Stuart

Dan Holohan

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

Ethan Grossman

Ethan Grossman uses daily life stories to illustrate engineering concepts.

Christoph Lohr

Christoph Lohr provides insight into the latest business and professional trends for engineers.

James Dipping

Dave Yates

Julius Ballanco

Julius Ballanco discusses codes and how they affect plumbing and mechanical engineers.

Ray Wohlfarth

Ray Wohlfarth’s talks about the installation, maintenance and repair of commercial boilers.

Editor's Note

Commentary from the editor of PM Engineer.

Guest Editorial

Fire Protection

Discussions on new developments and codes in fire protection.

Letters to the Editor

ARTICLES

Sealing the deal

John Siegenthaler: Details for venting pellet-fueled boilers

Sealing the deal
Siegenthaler
John Siegenthaler P.E.
March 31, 2023
No Comments

Given the current upward trend and volatility of fossil fuel pricing, there’s renewed interest in heating using wood pellets. Federal incentives that currently cover 26% of some qualified equipment adds enticement toward purchasing pellet-burning stoves.


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water fountain

Nicole Krawcke: Clean drinking water — an issue we can all agree on

Administration endeavors to replace all lead service lines within 10 years.
Nicole krawcke
Nicole Krawcke
March 8, 2023
No Comments

Democrat or Republican, we can all agree that lead in drinking water is bad. That was the takeaway from President Joe Biden’s State of the Union Address last month, where he discussed the Bipartisan Infrastructure Law (BIL) and how it has funded 20,000 projects since the legislation passed in 2021.


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inspecting the work

Dave Yates: The submittal process

They only matter if someone of authority is inspecting the work.
Dave yates
Dave Yates
March 7, 2023
No Comments

The first time I ever bid and landed a commercial plumbing contractor, it was for a huge retail store on the upper floor of a local shopping mall. Every bidder was required to provide submittals for virtually everything being installed.


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light filament

James Dipping: Non-chemical water treatment options for Legionella control

Specialty components to further reduce the risk of Legionella — part two.
James dipping
James Dipping
March 6, 2023
No Comments

In my January column, I began a series focused on chemical and non-chemical additives or technologies that I treat as “must consider” for plumbing engineers in their design practices to reduce the risk of legionella bacteria developing in the domestic water system.


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STRATEGIC PLUMBING INSIGHTS

Christoph Lohr: The plural sector and plumbing

An important driver of change in the construction industry.
Pme0819 lohr newsheadshot
Christoph Lohr
March 3, 2023
No Comments

In terms of civic engagement, younger generations have been voting and volunteering at higher rates than previous generations. Regardless of one’s political beliefs, I think we can all agree that politics has become a much bigger portion of daily life. Whether on social media or at our local coffee shop, we all are spending more energy talking about the bigger picture.


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compliance

Misty Guard: Code development changes in 2023

ICC has changes on the horizon.
Misty guard
Misty Guard
March 2, 2023
No Comments

Building and safety codes are near and dear to my heart as they, undoubtedly, have a significant impact on public health, safety and welfare. Buildings in every jurisdiction in the United States use some version of building and safety codes. In addition, building and safety codes cover most products manufactured for the building and construction industries.


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One size larger

John Siegenthaler: Opportunities to reduce head loss

One size larger
Siegenthaler
John Siegenthaler P.E.
March 1, 2023
No Comments

When designing hydronic circuits, most engineers focus on what’s necessary for that circuit to absorb thermal energy at a heat source, carry it along like a conveyor belt and drop it off at one or more heat emitters.


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implications of water shortages

Nicole Krawcke: Growing water scarcity is a problem with broad implications

Critical life-saving systems, such as fire protection, require an adequate water supply.
Nicole krawcke
Nicole Krawcke
February 13, 2023
No Comments

Water is a finite resource. Read that again, I’ll wait.


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180 degrees for hot-water systems

Dan Holohan: Why we use 180 degrees for hot-water systems

The history of The Carbon Club.
Holohan
Dan Holohan
February 10, 2023
One Comment


Most hydronic systems have the boiler running up to 180° F with water returning from the system at 160°. This rarely happens in real life, but it’s the traditional way we do things.


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doctors washing hands

Todd Stuart: Centralized domestic hot water systems

Design and installation coming together.
Stuart headshot
Todd Stuart
February 8, 2023
No Comments

In larger domestic hot water applications, we often see centralized water heating lineups with or without storage tank equipment to produce and distribute domestic hot water inside buildings and facilities. I often see these more robust systems in healthcare projects, numerous hospitality (hotel) projects as well as some multifamily installations when energy metering is not required for hot water serving the units (apartments).


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