PM Engineer Magazine

PME March 2022 cover

2022 March

The March 2022 issue of PM Engineer features a spotlight on PVF market, geothermal heat pumps, scald prevention, and much more!

Cover Story

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Feature Articles

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point-of-use mixing valves

Scald prevention valves: The last line of defense

DHW recirculation system provides accurate balanced tempered water control for new hotel.
Max Rohr
March 21, 2022
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Scald protection valves are the last line of defense in protecting occupants from dangerously hot water in plumbing systems. Point-of-use mixing valves keep building occupants safe and enable a variety of important domestic hot water recirculation applications. How are designers using scald protection mixing valves to advance the broader topic of DHW recirculation?


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Columnists

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When coal was king
FROM THE MECHANICAL ROOM

Dave Yates: When coal was king

Understanding operational efficiency and heat loss.
Dave yates
Dave Yates
March 10, 2022
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My grandparents lived in Saint Clair, Pennsylvania, which is in the heart of the anthracite coal region. Pop-Pop had a Westinghouse Appliance store and serviced everything they sold. In addition, he had helped to wire homes when electricity first became available and serviced lots of coal boilers. 


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showerhead as a single device that discharges water
CODES

Julius Ballanco: Showerheads: New administration, new definition

Rather than conserving water, the Trump-era definition of showerhead would allow for an increase in water usage.
Ballancojuliusvwhite 200
Julius Ballanco P.E., CPD
March 3, 2022
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In a previous column last year, I identified a change in definition, by the U.S. Department of Energy (DOE), regarding showerheads, body sprays and safety shower showerheads. In December 2020, during the Trump administration, DOE basically redefined “showerhead” as a single device that discharges water. Hence, if you installed two showerheads installed on a single shower valve, DOE would consider them two showerheads.


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Departments

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Zurn and Elkay merge

Zurn Water Solutions and Elkay Manufacturing to combine

February 14, 2022
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Zurn Water Solutions Corp. and Elkay Manufacturing Co. announced they have reached a definitive agreement to combine the businesses in an all-stock transaction. Upon completion of the transaction, Zurn Water Solutions shareholders will own approximately 71% and Elkay shareholders will own approximately 29% of the combined and newly named company — Zurn Elkay Water Solutions Corp.


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New Products

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Weil-Mclain Gas boiler
Product Focus: Boilers

Weil-Mclain Gas boiler

March 15, 2022
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Weil-McLain’s 95% AFUE high-efficiency ECO Tec boiler features heat only and combi versions for all residential space and domestic hot water heating, the company explains. 


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US Boiler Gas adaptive technology
Product Focus: Boilers

US Boiler Gas adaptive technology

March 11, 2022
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Available in heating and combi models, the all-new Alta offers next-generation gas adaptive technology, providing no-touch 5-minute startup, automatic self-calibration, and sensorless outdoor reset. 


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Laars MagnaTherm FT boiler
Product Focus: Boilers

Laars Commercial boiler

March 3, 2022
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With innovative design and control technology, the Laars MagnaTherm FT boiler provides reliability, exceptional energy efficiency and industry-leading performance for a variety of commercial applications and conditions, the company explains.


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