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PeakFlow Series

Scale Prevention System

PeakFlow Series anti scale system

Navien PeakFlow® prevents water scaling in your tankless water heater & your entire water supply system

Navien PeakFlow anti-scale systems have protected Navien tankless water heaters and combi boilers from damaging lime/calcium deposits for many years. This advanced scale prevention technology is now available to protect your complete water supply system, for residential and commercial applications.

  • side by side images of domestic hot water lines: one untreated pipe with severe scale buildup and one pipe treated with scale inhibitor that is clear

    Hot water piping

  •  side by side images of tankless water heater heat exchangers, one with severe scale buildup and one without scale buildup

    Heat exchanger in tankless water heater

  • side by side images of hot water outlet on tankless water heater, one with severe scale buildup and one without scale buildup

    Hot water outlet on water heater

Reduce scale, increase your energy efficiency

Monthly Utility Bill Water Heater Portion 30% Savings Annual Savings
$100.00 $20.00 $6.00 $72.00
$150.00 $30.00 $9.00 $108.00
$200.00 $40.00 $12.00 $144.00
$250.00 $50.00 $15.00 $180.00
$300.00 $60.00 $18.00 $216.00

Industry Studies indicate that reduction of scale and sediment can contribute up to a 30% increase in efficiency.

Navien PeakFlow® chemical-free and salt-free anti-scale water treatment systems are better for the environment.

PeakFlow water treatment technology is the ecological and economical anti-scale solution for residential and commercial water supply systems:

  • Prevents scale 
  • No chemical​s
  • Low maintenance​​
  • Low cost​
  • Environmentally friendly​

PeakFlow® Scale Prevention Media

PeakFlow® anti-scale technology transforms potential hard scale buildup to soft scale (aragonite and vaterite) that can easily be washed out with water flow. Without PeakFlow, the precipitated calcium carbonate forms calcite, a very hard type of scale that builds up in heat exchangers, lowering heat transfer efficiencies and blocking water flow. Calcite, vaterite and aragonite have the same composition (calcium carbonate) with different structures. PeakFlow prevents harmful calcite hard scale buildup, maintaining optimum water flow and appliance efficiency.

  • microscope image of calcite scale with crystalline structure

    Calcite scale - crystal structure

  • microscope image of vaterite scale with amorphous formation

    Vaterite scale - amorphous

  • microscope image of aragonite scale with needle-shaped crystals

    Aragonite - crystal needles

anti-scale system: PeakFlow models S, A and C for residential and commercial applications

PeakFlow® Models

Residential & light commercial

Learn more about PeakFlow S

Residential & commercial

 Learn more about the
PeakFlow A model

Commercial applications

Learn more about PeakFlow C

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