WTGO Oil Water Boiler Series 4
Features
Optimized System
Oil-fired water boiler with cast iron sections
Tankless Heater
High capacity / high efficiency tankless heater
Easy Access
Quick open top and swing-away burner door with full chamber access increases visibility for inspection and servicing
Reliability
Includes factory-wired circulator (when specified), service switch and Weil-McLain exclusive captured elastomer seals for added reliability
thoughtful Design
Recessed target wall design protects unit from flue brushes
Venting Options
Two flue outlets- rear and top – for complete venting flexibility
Flexible Install
Available assembled or as a knockdown for installation areas with limited space
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 | BURNER INPUT RATING GPH | BURNER INPUT RATING MBH | HEATING CAPACITY (MBH) | NET RATINGS (MBH) | AFUE | TANKLESS HEATERINTERMITTENT DRAW RATING (GPM) | DRAFT LOSS THROUGH BOILER (IN. W/C) | RECTANGULAR (IN.) | ROUND (IN.) | HEIGHT (FT.) | APPROX. SHIPPING WEIGHT (LBS.). | ENERGY STAR® |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WTGO-3LR | 0.7 | 98 | 86 | 75 | 86.4 | 3.25 | 0.1 | 8×8 | 6 | 15 | 560 | |
| WTGO-3LD | 0.95 | 133 | 115 | 100 | 86 | 3.25 | 0.01 | 8×8 | 6 | 15 | 560 | |
| WTGO-3R | 0.8 | 112 | 98 | 85 | 86.2 | 3.25 | 0.02 | 8×8 | 6 | 15 | 610 | |
| WTGO-3RD | 0.8 | 112 | 98 | 85 | 87 | 3.25 | 0.01 | 8×8 | 6 | 15 | 610 | YES |
| WTGO-3D | 0.95 | 133 | 115 | 100 | 86 | 3.25 | 0.02 | 8×8 | 6 | 15 | 610 | |
| WTGO-4R | 1 | 140 | 122 | 106 | 86.2 | 3.75 | 0.01 | 8×8 | 6 | 15 | 660 | |
| WTGO-4RD | 1 | 140 | 123 | 107 | 87 | 3.75 | 0.01 | 8×8 | 6 | 15 | 660 | YES |
| WTGO-4D | 1.2 | 168 | 146 | 127 | 86 | 3.75 | 0.01 | 8×8 | 6 | 15 | 660 | |
| WTGO-5R | 1.2 | 168 | 147 | 128 | 86.1 | 4 | 0.015 | 8×8 | 7 | 15 | 775 | |
| WTGO-5RD | 1.2 | 168 | 148 | 129 | 87 | 4 | 0.015 | 8×8 | 7 | 15 | 775 | YES |
| WTGO-5D | 1.45 | 203 | 176 | 153 | 86 | 4 | 0.015 | 8×8 | 7 | 15 | 775 | |
| WTGO-6R | 1.4 | 196 | 171 | 149 | 86.1 | 4.25 | 0.015 | 8×8 | 7 | 15 | 875 | |
| WTGO-6RD | 1.4 | 196 | 173 | 150 | 87 | 4.25 | 0.015 | 8×8 | 7 | 15 | 875 | YES |
| WTGO-6D | 1.75 | 245 | 213 | 185 | 86 | 4.25 | 0.015 | 8×8 | 7 | 15 | 875 | |
| WTGO-7R | 1.6 | 224 | 196 | 170 | 86 | 5.5 | 0.015 | 8×8 | 8 | 15 | 930 | |
| WTGO-7RD | 1.6 | 224 | 197 | 171 | 87 | 5.5 | 0.015 | 8×8 | 8 | 15 | 930 | YES |
| WTGO-7D | 2 | 280 | 244 | 212 | 86 | 5.5 | 0.015 | 8×8 | 8 | 15 | 930 | |
| WTGO-8 | 2.3 | 322 | 266 | 231 | – | 5.75 | 0.025 | 8×12 | 8 | 20 | 1,030 | |
| WTGO-9 | 2.55 | 357 | 295 | 257 | – | 6 | 0.03 | 8×12 | 8 | 20 | 1,135 |
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