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Articles by Ray Wohlfarth

The boiler gas train

Understanding this critical safety system can save your customers costly repairs.
February 20, 2014

One of the most misunderstood portions of the commercial heating system is the gas train. The gas train is a series of components that safely feed natural or propane gas into the burner.


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Controlling an existing hydronic boiler

Use a little more care when repairing or maintaining this equipment.
December 19, 2013

I like working with the control techs in our industry. They have such a passion for their craft. If left alone, they will control or monitor everything that moves, slides, shakes or switches.


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Are reps and distributors extinct?

Face-to-face customer service beats buying online in this business.
November 18, 2013

One of the companies we represent was owned by Russ Geaslen. He changed the boiler industry as we know it by designing and patenting the primary/secondary piping of modular boilers in 1964 (Patent No. US3329343A). Russ was half genius and half mad scientist. Unfortunately, he passed on to the big boiler room in the sky in 1996. I still miss him.


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Have you read the installation manual?

Documentation may save you from a lawsuit.
October 18, 2013

If you are like most designers or installers, I would wager that you have never read the installation manual for the piece of equipment that you design or install. And if you do not, you may be held responsible for any omissions recommended in that manual but not implemented.


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Are boilers dangerous?

Take precautions when repairing or maintaining commercial boilers.
September 20, 2013

John was a custodian for a local school district. We used to call him “20 Questions” because he would constantly ply us with questions about the boilers when we would perform the annual service. He would jokingly ask how many of the 20 questions he would have left.


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Are modulating burners worthwhile?

Consider low-high-low burners on your next replacement.
August 22, 2013

For years we have designed boiler rooms consisting of two oversized boilers with fully modulating burners. 


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Two-pipe system

How to control such a system during the shoulder seasons.
July 18, 2013

A complaint building maintenance departments frequently hear is that the occupants are either too hot or too cold. In some instances, both complaints may come from the same room. 


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Steam, the Original ‘Bad Boy’

Don’t approach steam like a hot water system.
April 19, 2013
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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Boiler Jacket Loss

The International Energy Conservation Code addresses the controversial subject.
March 15, 2013
The International Energy Conservation Code addresses the controversial subject.
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Understanding barometric dampers

Controlling boiler draft saves heat and reduces operating costs
January 15, 2013
One of the most misunderstood components inside a boiler room is the barometric damper, which is used to control the draft inside a boiler.


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BNP Media's Plumbing Group Visits Grundfos North American Headquarters

BNP Media’s Plumbing Group, comprised of the Plumbing & Mechanical, Supply House Times, PM Engineer (pme) and Reeves Journal brands, recently visited Grundfos’ new North American headquarters building in the western Chicago suburb of Downers Grove, Ill.

THE MAGAZINE

Plumbing and Mechanical

March 2014

2014 March

In the March issue of Plumbing & Mechanical, read about the 'living in place' movement and learn how to make your space stylish and comfortable. PM catches up with MCAA president Chuck Fell and spoke with him about his goals for the year. Also in this issue, see the top products of 2013, see who is the March Truck of the Month, and read the latest Tool Tips.
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Trade Associations

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The Plumbing and Mechanical Store

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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

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