84.0 - 86.5% AFUE
Heat Exchanger
Cast iron
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afue-86 The Annual Fuel Utilization Efficiency or AFUE rating is the percentage of fuel consumed that is converted to heat your home. A higher number is better.
heats Heats your indoor environment, using natural gas, oil, propane or electric power.
Energy Star Select Sizes Within this model some sizes earn the U.S. government's designation for superior energy efficiency and can help save costs on energy bills.


The versatile Performance 86 model BW5 boiler can serve all your hot water needs. It's our only boiler product that includes a tankless coil to heat water for domestic use. Its cast-iron heat exchanger also makes it an exceptionally dependable, long-lasting product.



  • Up to 86.5% AFUE
  • Oil-fired, hot-water output
  • Tankless coil domestic hot-water production
  • Cast-iron heat exchanger
  • Beckett or Riello oil burners
  • Electronic spark to pilot ignition
  • 10-year parts limited warranty1
  • 20-year heat exchanger limited warranty


  • Optional labor warranty available2

1 To the original owner, when product is used in an owner-occupied residence, a 10-year parts limited warranty upon timely registration of your new equipment. Warranty period is 5 years on parts if not registered within 90 days. Jurisdictions where warranty benefits cannot be conditioned on registration will automatically receive a 10-year parts limited warranty. See warranty certificate for details.

2 Ask your Carrier® dealer for details.



  • Up to 86.5% AFUE
  • Select sizes are ENERGY STAR® qualified*


  • Rated heating output: 80,000-209,000 Btu/h
  • 2.9 to 4.0 gal/min domestic water output at up to 140°F
  • Oil-fired, hot-water output


  • Cast-iron heat exchanger
  • Beckett or Riello oil burners
  • Electronic spark to pilot ignition
  • Combination high-limit and circulator relay
  • Integrated pressure relief valve
  • Barometric vent damper
  • Section seals are cast iron push nipple type
  • Recommended controls: Performance and Comfort series thermostats


  • 80,000-209,000 Btu/h


  • Power source: 110-125v


  • Painted, steel outer casing in taupe metallic
  • Dimensions: 36"H x 19.625"W; depth varies by size: 14.5"-21"