thermal efficiency | PM Engineer

High thermal efficiency water heater from Bradford White

January 18, 2018

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The Bradford White eF Series offers thermal efficiency ratings as high as 99.1%.

John Siegenthaler: Renewable Heating Design

Improving thermal energy

John Siegenthaler P.E.

March 27, 2017

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Good stratification improves the quality of thermal energy.

Plate heat exchanger from Bell & Gossett

June 23, 2016

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Bell & Gossett’s BPX 2” double-wall brazed-plate heat exchanger has a patented design and provides the highest level of leak protection.

Why did the boiler fail?

The following are some projects that went south because the equipment was not maintained properly.

Ray Wohlfarth

June 22, 2015

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Proper equipment maintenance is critical to avoid disaster.

John Siegenthaler: Solar Thermal Design Notebook

Renewable Heating Design: A complementary relationship

They rely on two-stage combustion where wood is heated in a primary chamber.

John Siegenthaler P.E.

March 25, 2015

One Comment

A complementary relationship with wood gasification boilers and modern hydronics.

Heating and cooling lessons at the grocery store

Dan Holohan

February 9, 2015

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Mama, Marie and me.

A sampling of low-temperature heat emitters

John Siegenthaler P.E.

December 4, 2014

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When you look at the big picture of hydronic heating on a worldwide basis, one of the most evident trends is migration toward low-temperature distribution systems.

ARMOR water heater from Lochinvar

Lochinvar’s two new ARMOR wall-mount commercial water heaters feature inputs of 125,000 Btu/hr., and 199,999 Btu/hr.

June 30, 2014

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Designed to be installed with a separate storage tank, this design protects against the harmful effects of lime-scale buildup. Since ARMOR heats the water and then deposits it in an unfired storage tank, lime-scale buildup does not impair the heat transfer efficiency.