Ruud Pacemaker (Standard and Ultra Low NOx) Gas Water Heater.

Pacemaker® gas water heaters feature the Guardian System – engineered to exceed ANSI standards for flammable vapor ignition resistance



  • .58 – .62 EF
  • More hot water at a low operating cost


  • FHR: 50 to 90-gallons for natural gas
  • Recovery: 30.3 to 50.5 gallons at a 90 degree rise, based on model Guardian System™ & Sensor
  • Exclusive air/fuel shut-off device
  • Maintenance free – no filter to clean

Low Emissions

  • Eco-friendly burner, low NOx design
  • Meets 40 ng/J NOx requirements

Longer Life

  • Patented magnesium anode rod with resistor protects the tank from rust

High Altitude Compliant

  • All models certified up to 6,000 ft. above sea level
  • Some models certified up to 10,200 ft. above sea level, check factory for listings


  • Easy to light – no matches required
  • EverKleen™ patented system fights sediment build-up
  • Brass drain valve and temperature and pressure relief valve are included
  • Standard replacement parts