SG Pro Series Boiler - QHT Inc. – Heating Solution Systems
2020-2-20 · Thank you for buying a BIASI SG boiler. The BIASI SG Pro is a cast iron, oil or gas fired hot water boiler, using the famous 3-pass design. The boiler is light, compact, simple, rugged and engineered for maximum home heating efficiency. We realize that it is not possible to answer all questions about the SG Pro-series boiler in this manual.
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