Radiant/Hydronics

Two-pipe system

How to control such a system during the shoulder seasons.
By Ray Wohlfarth
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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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Trade-offs in boilers

Two boiler characteristics that need to make a comeback.
By John Siegenthaler, P.E.
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 North American hydronic professionals can now choose from dozens of modulating/condensing (mod/con) boilers. Many are designed for wall-mounting. Those who design these boilers strive for small enclosures and low weight.  


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Guest Editorial: Hydronics offers a cool, comfort advantage

New technology lowers system costs.
By Greg Cunniff P.E.
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The world we live in would not be the same if air conditioning weren’t available. Entire regions of the world would have remained undeveloped, sustaining minimal populations, if air conditioning hadn’t become a part of our lives.


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Geothermal heat pump

Bosch Thermotechnology introduces a new compact water-source heat pump designed for use in retrofit or replacement applications.
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Bosch Thermotechnology introduces a new compact water-source heat pump designed for use in retrofit or replacement applications.


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Temperature gauge

Legend Valve continues to expand its existing offering of gauges.
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Legend Valve continues to expand its existing offering of gauges.


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Water heater app

Bradford White’s eF Series efficiency calculator app enables plumbing contractors and engineers to quickly and easily show customers the energy and cost-saving benefits of installing Bradford White eF Series ultra-high-efficiency commercial water heaters.
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Bradford White’s eF Series efficiency calculator app enables plumbing contractors and engineers to quickly and easily show customers the energy and cost-saving benefits of installing Bradford White eF Series ultra-high-efficiency commercial water heaters.


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Chimney stack assist kit

Tjernlund Products’ new chimney stack assist kit (Model CSA1) allows water heaters to be vented through existing connectors and oversized chimneys.
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Tjernlund Products’ new chimney stack assist kit (Model CSA1) allows water heaters to be vented through existing connectors and oversized chimneys.


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Understanding pump pressure that’s available vs. the required pressure

Not pumping so hot
By Dan Holohan
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I was lucky to have had as one of my teachers the late, great Gil Carlson.  


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The basics of radiant ceiling cooling

No drips allowed.
By John Siegenthaler, P.E.
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 For decades, well-designed and -installed hydronic heating systems have earned a reputation for superior comfort. Still, potential customers who understand and desire the benefits of hydronic heating often ask, “But how does this system provide cooling?”  


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Bosch showcases energy efficiency at new educational center

Bosch Thermotechnology Corp. opened an educational and interactive demonstration center May 31 in partnership with Serenbe, a 1,000-acre sustainable community development south of Atlanta.
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Bosch Thermotechnology Corp. opened an educational and interactive demonstration center May 31 in partnership with Serenbe, a 1,000-acre sustainable community development south of Atlanta.


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2014 Truck of the Month

PM has featured so many great plumbing service trucks! See plenty of them here in our Truck Of The Month Archives page. Are you proud of your truck? Go to our Truck of the Month page to find out how your service truck could be chosen!

9/16/14 9:00 am PDT

Free Webinar: Acoustical Isolation

HOLDRITE will be hosting a free webinar for Acoustical Isolation on Tuesday, Sept. 16, 2014.

Plumbing and Mechanical

2014 August

2014 August

In the August issue of PM, read about the continued construction and renovations being made to hotels and restaurants. Find out the focus of this year's ISH China show will be, who made this month's Truck of the Month and read what Elkay has to say about their commercial construction expansion. Also, read the latest news and discover the newest products being used by professionals in the plumbing and mechanical industry.
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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

Truck of the month

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