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.

Locate a contractor Locate a Distributor Product Comparison Tool

B100 Certified Oil Boilers

Sustainable Heat for a Changing World

Weil-McLain SGO oil boilers are now B100 Certified, delivering reliable performance while supporting renewable heating. When used with approved Beckett and Carlin oil burners, our boilers are certified to operate with up to 100% biodiesel, giving homeowners and contractors a dependable, efficient solution that’s built for today and ready for the future.

Technical Specs

MODEL	AFUE (%)	BURNER INPUT RATING (GPH)	NET (MBH)	DOE HEATING CAP. (MBH)	VENT SIZE (IN.)
UO-3 (0.80 GPH)	87	0.8	86	99	8 x 8
UO-3 (1.00 GPH)	87	1	107	123	8 x 8
UO-4	87	1.2	129	148	8 x 8
UO-5	87	1.4	150	173	8 x 8

Downloads

Product Manuals

Ultra Oil Boiler Manual Series 3 Beckett AFG CV Burner User Manual (for #2 Fuel Oil to B20) Beckett AFG CV Burner User Manual (for #2 Fuel Oil to B100) Beckett NX Burner User Manual (for #2 Fuel Oil) Carlin CV Burner User Manual for (#2 Fuel Oil to B20) Carlin EZ CV Burner User Manual (for #2 Fuel Oil to B100) Riello Chimney Vent Burner User Manual (for #2 Fuel Oil) Riello Direct Vent Burner User Manual (for #2 Fuel Oil)

Sales Collateral

Ultra Oil Boiler Series 3 Brochure Manufacturer Certificate

Technical Documents

Ultra Oil Suggested Specifications

Product Supplements

Ultra Oil Direct Vent Kit Instructions HydroStat 3250 Plus Temp Limit-LWCO Control Instructions B100 Biofuel Addendum and Burner Cross Reference Guide