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Williamson-Thermoflo OWB-6-T-S3-D
Williamson-Thermoflo · OWB-6-T-S3-D
Williamson-Thermoflo OWB-6-T-S3-D appears in the U.S. EPA ENERGY STAR "Certified Boilers" dataset, which lists products whose manufacturers have certified them to the program's specification (record 4707297, certified 2026-09-21). EPA publishes these rated values for the listing: Product type Boiler; Fuel type Oil; AFUE (%) 87; Can integrate hot water heating No. The listing records ENERGY STAR certification and the rated values the manufacturer reported to EPA. It is not a determination that any building, installation or design complies with a code.
✓ Verified 2026-10-03
Specs on this page were checked against ENERGY STAR Certified Boilers (data.energystar.gov/d/6rww-hpns) on 2026-10-03.
Specifications
| AFUE (%) | 87 |
| Fuel type | Oil |
| Product type | Boiler |
| Can integrate hot water heating | No |
Certifications & Standards
ENERGY STAR 4707297 Certified residential boiler, 2026-09-21
Sustainability
No sustainability metrics on file for this product.