A lean mixture in plumbing and heating systems refers to an air-gas mixture with a higher proportion of air than gas. This type of mixture is often used in combustion processes, such as those in gas-fired water heaters, furnaces, or boilers, to ensure complete combustion and reduce emissions. While a lean mixture can enhance efficiency and minimize carbon monoxide production, it can also result in incomplete combustion, leading to lower temperatures or potential ignition issues. Proper adjustment of the air-to-gas ratio is essential to achieve optimal performance, safety, and energy efficiency in gas-powered plumbing appliances.
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