Why is the size of the flue considered critical in gas equipment?

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The size of the flue is considered critical in gas equipment primarily because it impacts the removal of byproducts. A properly sized flue is essential for ensuring that combustion gases, such as carbon monoxide and other harmful byproducts, are effectively vented from the appliance to the outside atmosphere. If the flue is too small, it can lead to an accumulation of these gases within the equipment or the surrounding area, which poses serious safety hazards, including the risk of carbon monoxide poisoning.

Moreover, an appropriately sized flue not only facilitates the safe venting of gases but also helps maintain proper draft. This is important for efficient combustion, as a good draft ensures that the burner operates optimally, contributing to the overall safety and performance of the gas equipment. Therefore, addressing the flue size is critical for both safety and functionality in gas appliances.

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