Lennox 17J65 Orifice 321894 708 Precision Fit: Genuine OEM components Precision Fit: Genuine OEM components ensure compatibility with the die cast diaphragm cases and cast iron bodies of the 121 122 series as board revisions can vary product data and specifications are subject to change Optimized Combustion: Helps maintain the correct air to fuel ratio to maximize fuel efficiency and reduce carbon monoxide risk
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