What is the maximum allowable length for an electric dryer vent?

The maximum allowable length for an electric dryer vent is 35 feet. This length is important for ensuring the proper ventilation of the dryer, which plays a significant role in energy efficiency, performance, and safety. A vent that is too long can create excessive pressure drops, leading to reduced airflow and potential overheating of the dryer, which can cause inefficiency and increase the risk of lint build-up that may result in fire hazards.

When the vent length exceeds 35 feet, it may not effectively expel moisture and lint from the dryer, which could lead to longer drying times and higher energy consumption. Additionally, manufacturers typically recommend keeping dryer vents as short and straight as possible to optimize airflow.

When designing or installing dryer vent systems, it's crucial to adhere to these guidelines to ensure the appliance operates safely and efficiently. This standard helps maintain optimal dryer performance and minimizes the risk of issues related to venting, such as fire or mold growth within the home.