CSA ANSI Z21.47-1998/2.3-M98
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Gas-Fired Central Furnaces
1.1 Scope 1.
1.1 This standard applies to automatically operating gas- fired central furnaces (see Part XI, Definitions), hereinafter referred to as furnaces, for in
1.1 This standard applies to automatically operating gas- fired central furnaces (see Part XI, Definitions), hereinafter referred to as furnaces, for in
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