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Lennox XP14-018 Air Filter
It is advised that the air filter is swapped out every 90 days or so as to maintain good airflow through the ducts. The measurement proportions of the main system air filter optional choice but rather a requirement of whoever designed your heating and cooling system. All air filters come in a wide array of filtering levels, which all depends on your personal desire for cleaner air and air handler size requirements.
Some warnings of a declining primary air filter
- It is greatly advised to swap out your air filter four times a year for to keep the air inside the house cleaner
- The filter looks dusty and maybe should be replaced as soon as humanly possible
- When you face it toward a light, the light will barely infiltrate to the opposite side of the air filter
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