FAQ
How long can the du…
How long can the duct run be for a bathroom fan?
The length of the duct run has a significant impact on the performance and noise level of bathroom fans. The maximum recommended duct length depends on the duct diameter and is important to consider during planning and installation.
Answer:
The recommended maximum duct length depends on the duct diameter.
For a 100 mm duct diameter, the recommended duct run is up to approximately 90 cm.
For a 125 mm duct, the recommended duct run is up to approximately 5 metres.
For a 150 mm duct, the duct run can be approximately 8–10 metres.
Duct runs longer than recommended may result in reduced airflow and poorer performance.