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Friedrich P-09 Air Filter
Friedrich P-09 filters are available in many filtering types depending on your desire for cleaner air and air handler requirements. It is suggested that the filter is changed every 3 months to maintain the best air quality inside the house. The dimensions of the whole house filter personal choice but rather a requirement of your furnace or handler.
Some clues of a worsening air filter
- The system air filter looks dusty and the best thing to do would be to replace it today
- It is advised to swap out your air filter every season of the year in order to keep the air free from too much dust
- Sunlight will barely show through the filter at all
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