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Heaters |
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In 1869, Benjamin Sturtevant patented the first hot blast apparatus, marking the beginning of the modern air-blast apparatus as applied to heating, ventilating and drying applications. The early "Sturtevant System" was centralized with air forced by a fan across steam coils then conveyed through ducts to all parts of the building. The line would expand to include unit ventilators for schools and suspended/floor type heaters for commercial/industrial work. |
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1950s - 60s |
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1920s - 60s |
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1930s - 60s |
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1930s - 40s |
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1920s - 1940s |
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1920s |
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1890s - 1920s |
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1890s - 1920s |
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1900s - 1920s |
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