Featured image for “Primary-Secondary or Primary-Variable Heating Systems: Which System to Choose?”
Norm Hall
 / 
May 2, 2022
Boilers
, 
Delta T
, 
Monday Morning Minutes
, 
Primary Secondary
Primary-Secondary vs. Primary-Variable hydronic boiler pumping systems each have advantages for the engineer to consider. Most people in the industry are in one camp or... READ MORE
Printer Friendly (PDF)
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
Printer Friendly (PDF)
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
Printer Friendly (PDF)
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
Printer Friendly (PDF)
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
Printer Friendly (PDF)
Featured image for “Hydronic Radiant System Secondary Temperature Control Using “The Law of the Tee””
Norm Hall
 / 
August 19, 2019
Hydronic Design
, 
Monday Morning Minutes
, 
Primary Secondary
, 
Primary Secondary Piping
, 
Pumps
Primary-Secondary hydronic piping is a common piping scheme in today’s hydronic heating and cooling systems. This article will show you how to use this common... READ MORE
Printer Friendly (PDF)
Featured image for “Hydronic System Primary-Secondary Rules-Decoupling Systems”
Norm Hall
 / 
August 12, 2019
Hydronic Design
, 
Monday Morning Minutes
, 
Primary Secondary
, 
Primary Secondary Piping
, 
Pumps
Primary-Secondary (P-S) hydronic piping is a common piping scheme in today’s hydronic heating and cooling systems. This short series of blogs will provide examples of piping schemes which will support the reduction of hot water return temperatures to enhance the value of condensing boilers. The first article will just review the rules of the road in P-S piping. ... READ MORE
Printer Friendly (PDF)

Categories