1. Simply cut the filter's 12" x 14" sheet to the size of your vent.
   
   
2. Remove vent or register and attach to the underside.
   
   
3. May be attached to the outside of the vent for easier viewing.
   
   
4. Attach with supplied strips.
   
   
5. For optimal performance, change filter every 3 months.
   
   

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