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WaiWela PH2-20RDVS-N Gas Tankless Water Heater


The PH2-20RDVS is an excellent hot-water solution for the average 1 bath home. It will support one shower plus additional small household use (like a sink) at the same time.[This unit requires Metal-Fab 3"/5" Concentric Venting]


  • Residential & Commercial Applications
  • 0.26GPM Minimum Flow Rate / 0.4 GPM Activation
  • Integrated Appliance Adapter & Condensate Drain To Simplify Venting On Indoor Direct Vent Models
  • Supports both Horizontal & Vertical Venting
  • Wired Temperature Remote Control Included
  • Connect Up To 20 Units In Tandem
  • High Altitude Capable
  • Self Diagnostic System
  • Supplied 120V Power Cord On IndoorDirect Vent Models
  • Freeze Protected To -30°F
  • Low NOx burner
  • Accepts Preheated Water Up To 140°F
  • Made In Japan


  • ICAD
    Incomplete Combustion Avoidance Device Monitors Combustion For Evidence Of Unsafe Carbon Monoxide
  • Overheat Limit Wrap
    Resin Film Surrounds The Combustion Chamber, Detecting Overheating
  • Flame Failure Monitor
    Flame Rods Ensure Proper Firing & Detect Flame Failure
  • Anti-Scald Protection
    Temperature Controller Can be Adjusted To Prevent Scalding


  • Digital Controller
    Changes Temperature Settings Immediately & Precisely With The Touch Of A button, And Functions As A Diagnostic Display
  • Endless Hot Water
    Never Run Out Of Hot Water Again


User Manual

Warranty Information

12 Year Warranty on Heat Exchanger*
5 Year Warranty on Parts*
1 Year Warranty on Service*

* For residential applications. Commercial warranty is 5 year, 5 year, 1 year
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