The first modern oil furnace with a high-voltage system for self lighting was unveiled in 1918. By the mid-1920s, demand for oil furnaces was high and rising. Being a liquid, oil flows and can be ...
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5 Types of Furnaces and How to Identify Them“They’re cheaper to install, safe and have a longer lifespan ... When they kick on, there’s no visible flame. Oil furnaces burn an external fuel called fuel oil to generate heat.
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