For maximum effectiveness, we recommend you change your filter once every 1-3 months for best results.. However, the life of a filter can depend on the individual conditions in your home. You may need to change your filter more often if your home has:
- · Construction work in progress
- · Furniture or drywall sanding in progress
- · Pets
- · Smokers
- · A fan running continuously
In these cases, you may want to change the filter more frequently.