Featured image for “Primary-Secondary Variable Heating Systems: Should I Pump Into the Boiler or away from It?”
Norm Hall
 / 
April 25, 2022
Boilers
, 
Hydronic Design
, 
Monday Morning Minutes
, 
Primary Secondary Piping
, 
Primary Variable
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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Featured image for “Constant Speed 2-Way Control vs. Variable Speed Pumps for Heating and Cooling Coils (Part 2)”
Norm Hall
 / 
November 22, 2021
Hydronic Design
, 
Monday Morning Minutes
, 
Primary Secondary
, 
Primary Secondary Piping
, 
Pumps
, 
Variable Speed
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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Featured image for “Constant Speed 2-Way Control vs. Variable Speed Pumps for Heating and Cooling Coils (Part 1)”
Norm Hall
 / 
November 15, 2021
Hydronic Design
, 
Monday Morning Minutes
, 
Primary Secondary
, 
Primary Secondary Piping
, 
Pumps
, 
Variable Speed
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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Featured image for “Hydronic Primary-Secondary Piping – How Important are the Two Close Tees?”
Norm Hall
 / 
November 8, 2021
Hydronic Design
, 
Monday Morning Minutes
, 
Primary Secondary
, 
Primary Secondary Piping
, 
Pumps
, 
Variable Speed
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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Featured image for “Hydronic Heating Buffer Tanks – Part 3 – Variable Primary”
Norm Hall
 / 
November 30, 2020
Boilers
, 
Buffer Tanks
, 
Condensing
, 
Hydronic Design
, 
Monday Morning Minutes
, 
Primary Secondary Piping
, 
Tanks
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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Featured image for “Hydronic Heating Buffer Tanks Part 2 – Sizing”
Norm Hall
 / 
November 16, 2020
Boilers
, 
Buffer Tanks
, 
Condensing
, 
Hydronic Design
, 
Monday Morning Minutes
, 
Primary Secondary Piping
, 
Tanks
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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Featured image for “Hydronic Heating Buffer Tanks – Part 1 – Location”
Norm Hall
 / 
November 9, 2020
Boilers
, 
Buffer Tanks
, 
Condensing
, 
Hydronic Design
, 
Monday Morning Minutes
, 
Primary Secondary Piping
, 
Tanks
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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Featured image for “Primary – Secondary Piping and Water Tube Boiler Cycling”
Norm Hall
 / 
November 2, 2020
Boilers
, 
Condensing
, 
Hydronic Design
, 
Monday Morning Minutes
, 
Primary Secondary Piping
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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Featured image for “Primary – Secondary Sediment Separator Piping in Variable Flow Cooling Tower/Condenser Water Systems”
Norm Hall
 / 
February 24, 2020
Air & Dirt Control
, 
Cooling Tower
, 
Hydronic Design
, 
Monday Morning Minutes
, 
Piping
, 
Primary Secondary Piping
, 
Sediment Separators
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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Featured image for “Condensing Boilers and Air Handing Unit (AHU): Hydronic Hot Water Coil Return Temperature”
Norm Hall
 / 
September 16, 2019
Hydronic Design
, 
Monday Morning Minutes
, 
Primary Secondary
, 
Primary Secondary Piping
, 
Pumps
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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