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

RL Deppmann March 17, 2025Hydronic Design, Monday Morning Minutes, Pumps

You understand the differences between premium efficiency (IE3) motors and PMAC or ECM motors (IE4&5). You understand the cost implications of both styles of motors. …

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HydronicsPumpshydronic systems
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, 2025Pumps, Hydronic Design, Monday Morning Minutes

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
IEC motor efficiency graph
IEC motor efficiency graph

Permanent Magnet (PMAC) Motors & Electronically Commutated (ECM) Motors in Hydronic Systems (Part 1)

RL Deppmann March 3, 2025Monday Morning Minutes, Pumps, ECM

Hydronic system pumps and other HVAC and plumbing equipment will often have a variety of motor choices to specify. One of the newer additions to …

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HydronicsPumpsMotorsECMhydronic systemshydronic system
aerco boilers
aerco boilers

Condensing Boiler Venting Material (Part 1)

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

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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BoilersCondensingHydronicsPipingNorm HallVENThydronic systems

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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hydronic systemHydronicsNorm HallBell and Gossettpumps

Pump Minimum Flow Using a Cla-Val Back Pressure Valve

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

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

Flo-Control Gravity Check Valve Replacement

Norm Hall November 28, 2022Hydronic Design, Control Valves, Check Valves, Monday Morning Minutes, Valves

You have a Bell & Gossett Flo-Control valve on the primary secondary bridge of an older hydronic system. It has been there for over five …

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hydronic systemflo-controlHydronicsBell and GossettPSIGcheck valveshydronic systems

Heat Pump Water Heaters: Water Source Units (Part 12)

Norm Hall November 7, 2022Electric, Heat Pump Water Heaters, Heat Pump Water Heaters, Monday Morning Minutes, Water Heaters, Plumbing System Design

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

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Delta TWater HeatersHydronicsNorm Hallflow rate

Heat Pump Water Heaters: Drive Down First Cost Using Hybrid Solutions (Part 11)

Norm Hall October 31, 2022Electric, Heat Pump Water Heaters, Heat Pump Water Heaters, Monday Morning Minutes, Water Heaters, Plumbing System Design

The owner of a local engineering firm recently said to me, “First cost and space are key discussion points in any building design.” First cost …

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Water HeatersHydronicspumpshydronic systemshydronic system
frozen ice
frozen ice

Heat Pump Water Heaters: Standby Capacity (Part 7)

Norm Hall September 19, 2022Electric, Heat Pump Water Heaters, Monday Morning Minutes, Heat Pump Water Heaters, Water Heaters, Plumbing System Design

Hot water availability in many commercial and institutional buildings is critical. Engineers also know that these service water systems are generously sized for the peak …

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Water HeatersHydronicsNorm HallDomestic Hot Water Recirculation Systemshydronic systemhot water recirculation
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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