County Plumbing & Heating is here to take care of your plumbing, heating and a/c needs.

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Product Lines
Heating & Air Conditioning Systems

Ultra High Efficiency Oil Boiler

  • Dedicated water-only oil boiler
  • Flexible direct or chimney venting - no power assisted fan needed
  • Reversible swing-away burner door
  • Three-pass cast iron heat exchanger with captured elastomer seals
  • Efficiency 86% AFUE
  • Snap-on front jacket panel allows easy entry to the access burner door
  • All piping, wiring, and venting connections are located in the rear of the boiler
  • Optional Advanced Features Module that provides indoor/outdoor reset, DHW priority, stage firing and more
MODELOutput MBtuHIBR MBtuHFiring Rate GPHAFUEWater Content Gal.HxWxDWeight. Lbs.
UO-398.0 85.0 0.80 86.5 15.00 40x22.1x37 636
UO-4146.0 127.0 1.20 86.2 18.20 40x22.1x41 737
UO-5172.0 150.0 1.40 86.5 21.50 40x22.1x45 852

Warranty Information

  • All Parts for 24 months -
  • Heat Exchanger for 240 months - Limited 20 Year Warranty

Available Documents

  • View Document (2005 Ver., Black & White, Owners Manual, Boilers - Oil, Customer Information)
  • View Document (Consumer Literature, Color)
  • View Document (Advanced Features Module, Installation & Operation, Technical Information)
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