Point of Entry or Domestic Hot Water? Which type of Copper Silver Ionization Application Do You Need?

There are two main physical locations where you should consider installing copper silver ionization (CSI) technology for potable water treatment depending on your own Legionella risk assessment results – Point of Entry (POE) or Domestic Hot Water (DHW). Trained and certified CSIDefender® experts can work with you to determine which option is best for your facility requirements and then provide you with performance based CSI specifications.

Point of Entry or Domestic Hot Water treatment

What is Point of Entry Copper Silver Ionization?

A point of entry water treatment application is installed on the facility potable water source with the express purpose of treating all of the incoming water before it goes into the facility’s water distribution network.

CSI-POE systems include larger amperage capability (30 to 160 amps), and at least three or more ionization chamber cells installed in parallel to each other that will provide instant copper silver ionization injection. Each chamber cell has its own individual output ionization power drive, which is monitored by one of our powerful CSI-POE software based controllers to automatically adapt to the variable daily water usage flow in real time.

When Should You Use Point of Entry Copper Silver Ionization?

Some of the critical Legionella risk triggers that can justify the use of a CSI-POE system include:

  • Geographical location of the facility with incoming potable water temperatures above 68°F/20°C,
  • Facility potable water stagnation areas,
  • Low facility occupancy (seasonal, temporary or permanent),
  • Alleged Legionella issues without fully knowing the origins or location of the problem,
  • Overall Legionella risk assessment such as ASHRAE188 concludes that POE secondary water intervention is required

What is Domestic Hot Water Only Copper Silver Ionization?

A domestic hot water treatment system is installed in the facility’s potable hot water system with the express purpose of treating the DHW zone(s).

CSI-DHW systems are relatively smaller compared to CSI-POE systems, and normally start at amperage capacity of 5 to 160 amps, optional use of flow meters (not required in modern CSI technologies), and one to sixteen ionization chamber cells installed in parallel to each other based on the overall DHW usage load.

Each of the ionization chamber cells have a dedicated output ion power drive linked to an automated software based controller. The CSI Controller automatically adapts to any potable water conditions and can be linked to any building management system (BMS). The CSI-DHW solution can easily be installed on either the DHW return or supply side of the loop using standard commercially available pluming components.

Facilities with multiple separate DHW zones returning to a common mechanical room (yet remaining separate at all times) can install more powerful “Multi-Zone” CSI controllers to lower the overall technology footprint and relative cost without compromising on performance, safety or reliability.

When Should You Use Domestic Hot Water Only Copper Silver Ionization?

Some of the critical Legionella risk triggers that can justify the use of a CSI-DHW system include:

  • Geographical location of the facility with incoming potable water temperatures below 68°F/20°C
  • Hot temperature delivery below 140°F/60°C
  • Cold water mixing valve cross contamination
  • Possible dead legs
  • Age of a facility
  • Type of facility
  • Type of facility occupants
  • Biofilm presence
  • Known or possible Legionella issues
  • The overall Legionella risk assessment, such as ASHRAE188, concludes that secondary water disinfection intervention is only required for the DHW loop and not for 100% of the facilities incoming water supply.

Choosing the right CSI potable water treatment system depends on a variety of factors. To ensure you get the solution that best meets your needs, talk to one of our experts.

Let’s talk about How CSI Defender® can keep your water safe