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Panasonic CU-5E36QBU Air Filter
It is highly recommended the your furnace filter is swapped out every 90 days or so as to maintain good airflow inside the house. The actual size of the filter is not a optional choice due to the constraint of the availability of room of your HVAC blower system. All air filters come in many types and sizes, depending on your air quality needs and air handler requirements.
Some warnings to watch for in a bad air filter
- The filter looks gross and should be replaced right now
- It is advised to replace the filter about every 90 days in order for the machine to run more efficient and to breathe easier inside
- If you lift the air filter up to a source of bright light, the light cannot break through to the other side of the filter at all
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