The marketing directive is clear in the hydronic condensing boiler world. Make sure you highlight high efficiency in every boiler advertisement and bulletin. So before... READ MORE
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Condensing Boiler Staging & Dual Return for Higher Efficiency (Part 4 of 4)
Norm Hall
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February 21, 2022
An engineer uses larger temperature differences and deep reset when designing a condensing hydronic heating system. The design may utilize staging of multiple boilers in... READ MORE
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What is the Efficiency of my Installed Condensing Boiler? (Part 1 of 4)
Norm Hall
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January 31, 2022
This is part one of a four article series on Condensing Heating System Efficiency. Each week we will discuss maximizing efficiency not through product selection,... READ MORE
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Primary – Secondary Piping and Water Tube Boiler Cycling
Norm Hall
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November 2, 2020
Primary – Secondary piping is recommended with most water tube condensing boilers. Once the boilers have turned down to the lowest firing rate, cycling will... READ MORE
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Turndown Ratio in Condensing Water Tube vs. Fire Tube Boilers (Part 2 of 2)
Norm Hall
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October 26, 2020
Turndown was defined in Part 1 of this short series. In general, hydronic water tube boilers have a lower possible turndown ratio than fire tube... READ MORE
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Turndown Ratio in Condensing Water Tube vs. Fire Tube Boilers (Part 1 of 2)
Norm Hall
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October 19, 2020
Turndown is defined as the ratio of maximum fuel input rate to the minimum fuel input rate of a variable input burner. In general, it... READ MORE
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‘Tis the Season for Condensing Boilers
Paul Prentice and Josh Looper, R.L. Deppmann
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October 24, 2016
We’re taking a one-week pause in our humidification series to mention condensing boilers. A physical plant operator for a school district recently called and asked... READ MORE
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What is the efficiency of my installed condensing boiler or water heater?
Norm Hall
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June 15, 2009
If you answered 97%, you’re not alone. You’re most likely not right, but you’re not alone. Many boiler manufacturers have jumped into the world of... READ MORE
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