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Parallel Pumps
Parallel Pumps

HVAC Hydronic System: Parallel Pumps and Cost

Norm Hall January 27, 2020Parallel Pumping, Monday Morning Minutes, Pumps, Hydronic System Design, Parallel Pumping

Reduced cost is often viewed as the reason parallel pumping exists as a design option for engineers. In today’s hydronic heating and cooling systems, we …

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Standby Capacity
Standby Capacity

HVAC Hydronic System: Parallel Pumps and Standby Capacity

Norm Hall January 13, 2020Monday Morning Minutes, Pumps, Hydronic System Design, Parallel Pumping, Parallel Pumping

  Giving up the 100% standby pump is often the major concern when using parallel pumping strategies for hydronic heating and cooling systems.  This strategy …

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Parallel Pumping
Parallel Pumping

HVAC Hydronic System: Controlling Parallel Variable Speed Pumps

Norm Hall January 6, 2020Parallel Pumping, Parallel Pumping, Monday Morning Minutes, Pumps, Hydronic System Design

  The historical view of parallel pumping was to make sure all the staging points landed on the single constant speed pump curve. This avoided …

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Parallel Pump operation
Parallel Pump operation

HVAC Hydronic System: Parallel Pump Operation and Curves

Norm Hall December 30, 2019Monday Morning Minutes, Pumps, Hydronic System Design, Parallel Pumping, Parallel Pumping

Parallel pumping in hydronic systems can save energy and construction capital costs. Today we continue the series on parallel pumping where we look at the …

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Parallel and Series Pump Application
Parallel and Series Pump Application

Parallel Pumping: What is it and Why do it

Norm Hall December 23, 2019Hydronic System Design, Parallel Pumping, Parallel Pumping, Monday Morning Minutes, Pumps

Most hydronic heating and chilled water systems end up with one operating pump and one 100% standby pump. It is easy to understand, and the …

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Hydronic Cold Fill Makeup Valve
Hydronic Cold Fill Makeup Valve

Hydronic Cold Fill Makeup Valve: Keep it Open or Closed?

Norm Hall November 25, 2019Monday Morning Minutes, Tanks, Hydronic System Design, Expansion and Compression Tanks, Pressures, Expansion/Compression Tanks

The cold fill pressure setting in a closed hydronic heating or cooling system is still one of the key problems uncovered when our customer service …

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Expansion Tank Air Side Maintenance Schedule

Norm Hall November 18, 2019Expansion and Compression Tanks, Expansion/Compression Tanks, Monday Morning Minutes, Tanks, Hydronic System Design

I recently visited a school mechanical room and was asked about the relationship between the makeup pressure reducing valve setting and the expansion tank pressure …

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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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Domestic Water Heaters: Plate Heat Exchangers and Dual Return Condensing Boilers

Norm Hall September 9, 2019Cooling, Plumbing, Monday Morning Minutes, Heat Exchangers, Water Heaters, Plate Type, Tankless, Hydronic System Design

Gas-fired storage type domestic water heaters are the norm in commercial and institutional buildings. Walk into any mechanical room of a larger complex and you …

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PS Sketch
PS Sketch

Hydronic Primary/Secondary Heating-Cooling (Chiller) Changeover Systems

Norm Hall September 2, 2019Monday Morning Minutes, Hydronic System Design, Primary Secondary Piping, Cooling

Once in a while, we still see the two pipe heating or cooling system with a manual or automatic changeover process that the owner uses …

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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