Slant Fin Cast Iron Boiler, 1-1/2" Supply/Return, 105 MBH, 84% AFUE, Natural Gas, Floor Mount, Atmospheric Chimney Vented

  • Brand: Slant/Fin®
  • AFUE Rating: 84 Percent
  • AGA Input Rating: 105000 BTU/Hour
  • Air Inlet Connection: 3/4 Inch
  • Boiler Dimensions: 14-1/8 Inch Width x 19-3/4 Inch Depth x 28-7/16 Inch Height
  • Boiler Height Including Draft Hood: 46-3/16 Inch
  • DOE Heating Capacity: 89000 BTU/Hour
  • Ignition Type: Intermittent
  • Inclusions/Features: Metal Push Nipple, Specially Shaped Thermal Pin, Thermal Pre-Purge, Thermal Targeting Technology
  • Net IBR Rating: 77000 BTU/Hour
The Sentinel boiler is a hot water gas boiler with a heat exchanger which has for years been a inworkhorse in of the heating industry. The Sentinel is available for use with propane or natural gas. This boiler is popular with many heating contractors for performance and reliability.
  • Features and More


  • Reliable Natural Draft Design
  • Quality Control Features
  • High Performance Heating
  • Thermal Targeting Technology to Conserve Fuel by Monitoring Heating Demand
  • Low Water Cut-Off Function
  • Thermal Pre-Purge Option to Save Fuel
  • Display Shows Boiler Water Temperature and Boiler Control's Setting
  • LED Lights Provides Information of Boiler Operation
  • Easy Installation and Reliable Operation that Natural Draft Design Provides Intermittent Ignition
  • High Performance Cast-Iron Heat Exchanger
  • Specially Shaped Thermal Pins Promoting Efficient Heat Transfer
  • No Mechanical Combustion Aids are Required
  • Special Port Construction will Not Permit Flame to "Lift" or Flash Back
  • Limited Lifetime Warranty


    Thermal Targeting Technology, Thermal Pre-Purge, Display, LED Light, Specially Shaped Thermal Pin, Metal Push Nipple