What material is typically not recommended for dryer ducts?

Study for the NHIE Insulation and Ventilation Exam. Review content with flashcards and multiple-choice questions, each offering hints and explanations. Ensure you are prepared for the test!

Plastic is typically not recommended for dryer ducts due to its susceptibility to heat and potential for combustion. When dryers operate, they generate significant amounts of heat and lint, which can create a fire hazard if the ducting material is not able to withstand high temperatures and does not effectively vent exhaust air. Plastic can also become deformed or melt over time, compromising both the efficiency of the dryer and safety by increasing the risk of lint buildup, which is a major fire source.

In contrast, materials such as aluminum, hard metal, and flexible metal are preferred for dryer ducts because they can withstand the high temperatures generated by dryers, are less likely to accumulate lint, and provide a secure seal against the escape of air and moisture. These materials are also easier to keep clean and maintain proper airflow, which helps reduce drying times and improve energy efficiency.

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