Slant/Fin® Galaxy™ 20991211NV GG-275 HEDP Packaged Hot Water Gas Fired Boiler, Natural Gas Fuel, 275000 Btu/hr Input, Damper Vent, Cast Iron Housing, 3/4 in FNPT Gas Connection, Intermittent Pilot Ignition

  • AFUE Rating: 84 %
  • Connection Type: 3/4 in FNPT Gas
  • Dimensions: 29-3/4 in W x 24-1/2 in D
  • DOE Heating Capacity: 233000 Btu/hr
  • Flue Outlet Size: 8 in
  • Fuel Type: Natural Gas
  • Ignition Type: Intermittent Pilot
  • Input Capacity: 275000 Btu/hr
  • Manufacturer Name: Slant/Fin Corporation
  • Series: GG Series, GG-275 HEDP
  • Vent Type: Damper
  • Brand: Slant/Fin®
Slant/Fin®'s Galaxy™ is a hot water boiler heating system which is one of America's most trusted gas boilers. Installed in tens of thousands of homes, Galaxy™ is the choice of experienced heating professionals everywhere. For homeowners, it's the wise choice for long-term efficiency and reliability. It doesn't rely on complex technologies for its efficiency, so there's less to pay for now and less to go wrong. While other boilers become subject to performance and breakdown problems over the years, you can count on Galaxy™ for efficient, trouble-free performance.
  • Features and More


  • Atmospheric natural draft
  • Capacities for residential to light commercial requirements
  • Extended jacket conceals controls, wires and gas valve
  • Assembled with only durable metal push nipples


  • Residential


  • Pre-Assembled Heat Exchanger
  • Base
  • Flue Collector
  • Gas Burners
  • Gas Orifices
  • Manifold Assembly
  • Combination Gas Valve
  • Pressure Regulator
  • Pressure Relief Valve
  • Blocked Vent Safety Switch
  • Pre-Assembled Insulated Semi-extended Jacket
  • Circulator
  • Drain Cock
  • Taco T010 Pump and 59-5/8 in External Draft Hood


  • 2021 DOE Compliant
  • AHRI Certified
  • ASME Specified
  • cCSAus Listed
  • CSA Certified
  • Prop 65: California


  • 25 Years Limited Lifetime