Follow the procedure below when replacing the air filter.
1 Turn off the projector power and remove the power plug.
2 Place your finger on the notch under the filter unit on the side of the projector and pull the filter unit out

3 Press up on the air filter from below and remove it from the air filter frame.
4 Install a new air filter in the air filter frame.
5 Securely insert the frame holding the air filter, all the way into the projector.

• After air filter replacement, reset [Air filter counter] 
• Handle the air filter carefully. If damaged, the air filter will not work properly.
• To purchase an air filter (part no: RS-FL05), contact the Canon Customer Support Center.