The Allstar Advantage

30-175 HP

Many Advanced Features Well Thought Out Details

General Overview – AF3 Series & CF3 Series
View printable literature – Allstar AF3


  • Guarantee up to 85% combustion efficiency on natural gas
  • Advanced STEEL design
  • High output firetube configuration
  • Heavy-duty, first-class materials
  • Factory test-fired
  • Fully assembled
  • “Off the shelf” components resulting in lower parts costs
  • Minimal service costs
  • Engineered to last
  • Equipped with premium, packaged, FORCED DRAFT burners
  • Excellent overall plant efficiency
  • Skillfully crafted to our high standards
  • Built for quick easy service and maintenance
  • REAL boiler construction
  • Outstanding inspection accessibility
  • Durable, WETBACK firebox
  • Well insulated 2-layer refractory floor

Slimline Dimensions

  • Space-saving
  • Created with extensive design experience
  • High quality – exceptional value

Standard Steam Trim

  • Safety valve(s)
  • Waterglass set
  • Pressure gauge
  • Gauge cock
  • Trycocks
  • Pressure control – high limit safety (manual reset)
  • Pressure control – operating
  • Pressure control – high fire or proportional (modulating)
  • McDonnell & Miller 157S low water cutoff and pump control
  • Water column blowdown valve
  • Manual reset, probe type auxiliary low water cutoff control
  • Drain valve
  • Stack thermometer

Standard Hot Water Trim

  • Relief valve(s)
  • Pressure gauge with gauge cock
  • Water temperature indicator
  • Manual reset, probe type low water cutoff
  • Operating temperature control
  • Manual reset high limit temperature control
  • High fire temperature control or proportional firing rate (modulating) control
  • Drain valve
  • Stack thermometer

Options and Alternatives

We specialize in customizing your boiler. The Allstar can be equipped to suit a wide variety of installations and specifications. We will help direct you to the most cost-effective models and features. Low NOx.