Norm Hall
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April 25, 2022
Previously, the R. L. Deppmann Monday Morning Minutes looked at pump location in a primary-variable boiler heating system. We made a very definitive statement about... READ MORE
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An engineer asked a question about using a variable speed pump for air temperature control in lieu of a two-way control valve. What are the... READ MORE
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An engineer asked a question about using variable speed pumps for air temperature control in lieu of a two-way control valve. The question clearly makes you... READ MORE
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Every year we get questions about the importance of primary-secondary piping rules around boilers and coils. Recently, I also received a call about using a... READ MORE
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Hydronic Heating Buffer Tanks – Part 3 – Variable Primary
Norm Hall
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November 30, 2020
Hydronic heating system buffer tanks requirements and sizing were addressed in parts 1 & 2 of this short series. I received a couple of questions... READ MORE
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Hydronic Heating Buffer Tanks Part 2 – Sizing
Norm Hall
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November 16, 2020
Hydronic heating system buffer tanks are used to add water volume to the system to help avoid excessive cycling of the boiler. How do you... READ MORE
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Hydronic Heating Buffer Tanks – Part 1 – Location
Norm Hall
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November 9, 2020
We know that cycling a hydronic condensing boiler on and off too often will waste energy. There are other problems caused by a boiler cycling... 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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The last R. L. Deppmann Monday Morning Minutes offered suggestions for the use of a Griswold sediment separator in a variable flow tower system. The... READ MORE
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Correction to my 8-26-19 blog. In the rush to get on vacation I messed up on my math. This is corrected. Thank you to Tom... READ MORE
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