What is the maximum support interval for electric dryer metal duct?

The maximum support interval for metal ducts used in electric dryer installations is set to ensure that the ductwork remains stable and does not sag or become misaligned, which could hinder airflow and reduce the efficiency of the dryer. Supporting the duct properly also helps to prevent any potential damage to the duct material that may arise from excessive bending or weight.

The standard for electric dryer duct installation specifies that metal ducts should be supported at intervals not exceeding 12 feet on center. This guideline is based on maintaining structural integrity and facilitating adequate airflow through the duct, which is crucial for the safe operation of the dryer.

Support intervals longer than 12 feet could lead to issues such as duct sagging or disconnection at joints, both of which could create airflow restrictions or even fire hazards due to lint buildup. Therefore, the specification of a maximum of 12 feet ensures that the system operates efficiently and safely.