Click the links belo. You can also add more ductwork get a floor vent or just use a fan to add extra airflow during your projects. Bathroom Exhaust Fan No Attic Access For links to purchase. Install bathroom fan without attic access . Turn off the breaker. Evaluate the Electrical options. For a fan and light switch with existing wiring splice the white wires and connect the grounds securely with wire. Then cut an access hole in the ceiling right next to the wall where you can cut the exhaust hole in the sidewall. Steps for Removing the Old Bathroom Exhaust Fan. Another option is to locate the fan hole between two ceiling joists. Measure the Fan Housing and Duct. The Home Mender Dustin Luby shows us how to replace your old worn out bathroom exhaust fan with new without going in the attic. Replacing the Exhaust Fan Without Attic Access. Remove Motor from Housing. For a more detailed explanation of this process just read on. If you need to replace a bathroom...