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Carrier 35BF Air Filter
All air filters come in many filtering levels, in which the one you choose will depend on your demands for clean air and air handler size requirements. The size of the filter is not really a choice you make because of the constraint of your HVAC blower system. It is advised that the filter that filters out particles from your home is changed every 3 months so as to maintain good airflow throughout the home.
Subtle cues of an inadequate main filter
- It is greatly recommended to switch out the air filter in your unit about every 90 days so as to have cleaner breathable air
- As you face it toward a light source, it will almost not show on the other side the filter
- The system air filter looks gray or brown and it would be a good idea to replace it immediately
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