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how to place boiler image
how to place boiler image

Primary-Secondary or Primary-Variable Heating Systems: Which System to Choose?

Norm Hall May 2, 2022Monday Morning Minutes, Boilers, Primary Secondary, Delta T

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 …

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Delta TBoilersNorm HallBell and Gossettflow ratepumpsprimary secondary prinicplesprimary variable flow system

Condensing Boiler Efficiency and Your Boiler Schedule

Norm Hall February 28, 2022Monday Morning Minutes, Boilers, Condensing, Efficiency

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 …

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Boilersboiler efficiencyreturn temperaturecondensing boilers
Thermal Efficiency of BMK3000
Thermal Efficiency of BMK3000

Condensing Boiler Staging & Dual Return for Higher Efficiency (Part 4 of 4)

Norm Hall February 21, 2022Efficiency, Monday Morning Minutes, Boilers, Condensing

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 …

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hydronic systemDelta TBoilersCondensingHydronicsNorm Hallhydronic systems
efficiency chart
efficiency chart

Condensing Boiler Temperature Reset for Increased Efficiency (Part 3 of 4)

Norm Hall February 14, 2022Delta T, Monday Morning Minutes, Boilers, Condensing, Hydronic Design, Delta T

We are continuing with the series on Condensing Heating System Efficiency. Today, we are discussing condensing boiler temperature reset for increased efficiency. Hydronic condensing heating …

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Delta TBoilersCondensingNorm Hallwater quality
aerco benchmark boilers
aerco benchmark boilers

Hydronic System Design – High Delta T Can Improve Boiler Efficiency (Part 2 of 4)

Norm Hall February 7, 2022Monday Morning Minutes, Boilers, Condensing, Hydronic System Design, Primary Secondary Piping, Temperature Control, Selection and Specification

How can you increase the operating efficiency of your condensing boiler heating system? This question was raised in the last R. L. Deppmann Monday Morning …

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What is the Efficiency of my Installed Condensing Boiler? (Part 1 of 4)

Norm Hall January 31, 2022Efficiency, Operation, Monday Morning Minutes, Boilers, Condensing

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, …

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BoilersCondensingCondensing Boilerboiler efficiencyefficient condensing boilers
primary secondary piping
primary secondary piping

Primary – Secondary Piping and Water Tube Boiler Cycling

Norm Hall November 2, 2020Operation, Hydronic System Design, Primary Secondary Piping, Monday Morning Minutes, Boilers, Condensing, Efficiency

Primary – Secondary piping is recommended with most water tube condensing boilers. Once the boilers have turned down to the lowest firing rate, cycling will …

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air handling units
air handling units

Condensing Boilers and Air Handing Unit (AHU): Hydronic Hot Water Coil Return Temperature

Norm Hall September 16, 2019Monday Morning Minutes, Boilers, Condensing, Hydronic System Design, Design, Heating

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 …

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air handling units
air handling units

Condensing Boilers and Air Handling Units (AHU): Hydronic Hot Water Coil Return Temperature

Norm Hall August 26, 2019Monday Morning Minutes, Boilers, Condensing, Operation, Hydronic System Design, Primary Variable Piping, Temperature Control

Hydronic system hot water coils in air handling units often have secondary pumps for freeze protection. The hot water coils usually have design temperatures that …

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snow melt diagram
snow melt diagram

“Top 6” Dual Return Condensing Boiler Opportunities for Enhanced Savings

Norm Hall August 5, 2019Operation, Hydronic System Design, Selection and Specification, Heating, Monday Morning Minutes, Boilers, Condensing

Dual return condensing boilers can enhance the efficiency of your heating plant by 3-6%. How can an HVAC and Plumbing engineers design the system to …

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  • Products
    • Overview
    • Pumps and Accessories
    • Boilers and Water Heaters
      • Water Heater Stock
      • Boiler Stock
    • Hydronic Systems
    • Plumbing Systems
    • Steam and Condensate
    • Variable Frequency Drives (VFDs)
    • Glycol Solutions
    • Snowmelt Designs
  • System Design
    • Overview
    • Project Gallery
    • Selection and Design Tools
  • Water Solutions
  • Contractors
  • Service & Parts
    • Overview
    • Startup and Warranty
    • Parts
    • Service and Maintenance
  • Education
    • Overview
    • Basic Hydronic Blog Articles
    • Training Opportunities
    • Factory Classes
  • About RLD
    • Overview
    • Team Deppmann
    • R.L. Deppmann Locations
    • Careers
    • Community Engagement
    • Press and News