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IEC motor efficiency graph
IEC motor efficiency graph

Permanent Magnet (PMAC) Motors & Electronically Commutated (ECM) Motors in Hydronic Systems (Part 2 of 3)

RL Deppmann March 10, 2025Monday Morning Minutes, Pumps, Hydronic Design

Can I and should I specify permanent magnet motors (PMAC) on my hydronic system pumps? The last R. L. Deppmann Monday Morning Minutes showed the …

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HydronicsPumpsNorm Hallhydronic systems
aerco boilers
aerco boilers

Condensing Boiler Venting Material (Part 2)

RL Deppmann February 24, 2025Boilers, Condensing, Venting, Venting, Monday Morning Minutes

Proper venting of hydronic condensing boilers is critical for the safety of occupants and the successful operation of the heating plant. Part one of this two-part series …

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CondensingNorm HallVENTPVCCPVCHeat ExchangersBoilers
aerco boilers
aerco boilers

Condensing Boiler Venting Material (Part 1)

RL Deppmann February 17, 2025Boilers, Condensing, Venting, Monday Morning Minutes

Proper venting of hydronic condensing boilers is critical for the safety of occupants and the successful operation of the heating plant. The materials that may …

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HydronicsPipingNorm HallVENThydronic systemsBoilersCondensing

Hydronic Systems Pump Minimum Flow Methods

Norm Hall January 16, 2023Minimum Flow, Control, Monday Morning Minutes, Pumps

Minimum pump flow rate is critical to the trouble-free operation and longevity of the centrifugal pump. In the last blog we described the use of …

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HydronicsNorm HallBell and Gossettpumpshydronic system

Pump Minimum Flow Using a Cla-Val Back Pressure Valve

Norm Hall January 9, 2023Minimum Flow, Control, Pressure Regulating, Monday Morning Minutes, Pumps, Valves

Minimum pump flow rate is critical to the trouble-free operation and longevity of the centrifugal pump. The pressure sustaining valve or back pressure valve is …

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HydronicsNorm HallBell and Gossettpumps

Pumping From an Atmospheric Tank: Pump and Tank Control (Part 3)

Norm Hall January 2, 2023Pumps, Variable Speed, Control, Monday Morning Minutes

Let me start by wishing everyone a Happy and Prosperous New Year. This blog begins the 14th year of the R. L. Deppmann Monday Morning …

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variable speedPipingTanksNorm Hallpumps

Pumping from an Atmospheric Tank: Pump and Tank Piping (Part 2)

Norm Hall December 19, 2022Pumps, NPSH, Selection and Specification, Monday Morning Minutes

What can be simpler than pumping water from an open or atmospheric tank into another tank or system? What seems simple to many opens a …

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Norm HallBell and GossettpumpsPipingTanks

Pumping from an Atmospheric Tank: Pump Selection and Installation (Part 1)

Norm Hall December 12, 2022Pumps, NPSH, Selection and Specification, Monday Morning Minutes

What can be simpler than pumping water from an open or atmospheric tank into another tank or system? What seems simple to many opens a …

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NPSHpumpsvariable speedhydrovarNorm HallBell and Gossett

Commercial Tankless Water Heaters: O2 Trim and Controls

Norm Hall December 5, 2022Water Heaters, Plumbing System Design, Tankless, Tankless, Monday Morning Minutes

Gas fired water heaters remain the solution for most commercial water heater applications. Tankless gas fired water heaters are the choice of many engineers. Tankless …

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Norm Halltankless water heaterwarrantytankless water heatersWater Heaters

Heat Pump Water Heaters: Chilled Water Source (Part 13)

Norm Hall November 14, 2022Water Heaters, Plumbing System Design, Electric, Heat Pump Water Heaters, Heat Pump Water Heaters, Monday Morning Minutes

Many heat pumps used in Ohio and Michigan are water source for comfort heating and cooling. Today, we want to look at the opportunity to …

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Water HeatersNorm HallASHRAEwater quality
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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