Identify the fan and building
Record the fan model, building type, location and any existing ventilation arrangement. Do not assume a rule or layout from another home applies to an apartment, renovation or different jurisdiction.
Check the current product and local requirements
Read the exact fan maker's installation instructions and consult the current building authority or qualified building/HVAC professional for applicable requirements. Ask which version or rule applies to the property and proposed work.
Do not modify ducting from generic instructions
This article does not provide a duct route, connection method, hole size or permission to vent into a roof space, wall or other area. Have the responsible qualified professional assess the site and system before installation or alteration.
Keep ventilation and cleaning separate
Cleaning a bathroom does not install ventilation, diagnose building moisture or determine whether a system complies. If there is a building or ventilation concern, seek the appropriate technical assessment.
