Home Products Ultra Oil Boiler
Share this page
Effortless comfort, Maximum Efficiency

Ultra® Oil Boiler

Ultra Oil Boiler

Features


Simplified System

Dedicated water-only oil boiler

Flexible Venting

Flexible direct or chimney venting – no power assisted fan needed

Easy Access

Reversible swing-away burner door

Three-Pass Design

Three-pass cast iron heat exchanger with captured elastomer seals

HIGH EFFICIENCY

87% AFUE Series 3

Clean Design

Sleek, innovatively styled jacket with rear piping and wiring openings, and concealed controls for an
appliance-like appearance.

big on warmth, low on energy use

Engineered for comfort, designed for efficiency

Certified ENERGY STAR® and heat pump ready, this high-efficiency boiler delivers powerful, eco-friendly performance while keeping energy costs low.

Energy Star logo with text and star design.
A logo with a blue and green gradient droplet and the text "HEAT PUMP READY."

Technical Specs


MODELAFUE (%)BURNER INPUT RATING (GPH)NET (MBH)DOE HEATING CAP. (MBH)VENT SIZE (IN.)
UO-3 (0.80 GPH)870.886998 x 8
UO-3 (1.00 GPH)8711071238 x 8
UO-4871.21291488 x 8
UO-5871.41501738 x 8


More Residential Boilers


  • Simplicity Gas Combi Boiler

    Simplicity Gas Combi Boiler

    Learn More about Simplicity Gas Combi Boiler
  • ECO Tec residential gas boiler

    ECO Tec

    Learn More about ECO Tec
  • Evergreen High Efficiency Gas Boiler

    Evergreen Pro Gas Boiler

    Learn More about Evergreen Pro Gas Boiler
  • WTGO Series 4 Oil-Fired Water Boiler

    WTGO Series 4 Oil-Fired Water Boiler

    Learn More about WTGO Series 4 Oil-Fired Water Boiler
  • WGO Series 4 Oil-Fired Water Boiler

    WGO Series 4 Oil-Fired Water Boiler

    Learn More about WGO Series 4 Oil-Fired Water Boiler
  • SGO Series 4 Oil-Fired Steam Boiler

    SGO Series 4 Oil-Fired Steam Boiler

    Learn More about SGO Series 4 Oil-Fired Steam Boiler
  • CGa Gas Boiler Series 3

    CGa Gas Boiler Series 3

    Learn More about CGa Gas Boiler Series 3
  • CGi Gas Boiler Series 4

    CGi Gas Boiler Series 4

    Learn More about CGi Gas Boiler Series 4
  • AquaBalance Series 2 High-Efficiency Gas Water Boiler

    AquaBalance Series 2

    Learn More about AquaBalance Series 2
  • Ultra S4 Residential Gas Water Boiler

    Ultra S4 Gas Boiler

    Learn More about Ultra S4 Gas Boiler
  • GV90+ Gas Boiler

    Learn More about GV90+ Gas Boiler
  • EG Series 6 Gas Boiler

    EG Series 6 Gas Boiler

    Learn More about EG Series 6 Gas Boiler