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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

Flo-Control Gravity Check Valve Replacement

Norm Hall November 28, 2022Check Valves, Monday Morning Minutes, Valves, Hydronic Design, Control 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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flo-controlHydronicsBell and GossettPSIGcheck valveshydronic systemshydronic system

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

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

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
commercial pump water heater
commercial pump water heater

Heat Pump Water Heaters: Hot Water Recirculation (Part 6)

Norm Hall September 12, 2022Monday Morning Minutes, Water Heaters, Plumbing System Design, Electric, Heat Pump Water Heaters, Heat Pump Water Heaters

How does the commercial heat pump water heater, using the preferred R-744 refrigerant, handle the domestic hot water recirculation load? The R-744 (carbon dioxide) heat …

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Water HeatersHydronicsNorm Hallhydronic systemsDomestic Hot Water Recirculation Systems
bryan bh boiler
bryan bh boiler

Top 10 Things You Should Know About Commercial Electric Boilers (Part 2)

Norm Hall June 6, 2022Monday Morning Minutes, Boilers, Electrical

Welcome back to Part Two of our top 10 things to know about commercial electric boilers. As mentioned last week, HVAC and Plumbing Engineers are …

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BoilersHydronicsNorm Hallhydronic systemsHVAC Hydronic Systemhydronic systemHVAC Systems
bryan bh boiler
bryan bh boiler

Top 10 Things You Should Know About Commercial Electric Boilers (Part 1)

Norm Hall May 30, 2022Monday Morning Minutes, Boilers, Condensing, Operation

HVAC and Plumbing Engineers are discussing more decarbonization and electrification of systems with their clients. The use of electric boilers vs. gas fired condensing boilers …

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BoilersCondensingHydronicsNorm Hallhydronic systemsHVAC Hydronic Systemhydronic system
lightbulb
lightbulb

Carbon Reduction is the Dream. Here’s How to Make it a Good One.

Norm Hall May 23, 2022Plumbing System Design, Hydronic Design, Decarbonzation, Decarbonization

Carbon reduction in building design is critical to the lifestyle of our future generations. Most engineers and their owner clients understand the concerns and welcome …

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HydronicsPumpsNorm Hallhydronic systemsdecarbonization
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  • Products
    • Overview
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    • 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
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  • Water Solutions
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  • About RLD
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