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International Comfort Products GDJ100M12B1 Air Filter
It is recommended the your furnace filter is changed four times a year for optimal air quality inside the house. The size of the filter is not a personal choice because it is based on the declared size of your furnace or handler. Air Filters come in many filtering levels, depending on your air quality needs and air handler size requirements.
Indications of a bad main filter
- Manufacturers have advised to swap out your air filter about every three months to keep the house clean and less dusty
- With a light behind the air filter, the light is unable to shine through the dirt filled filter
- The filter looks bad and could be replaced real soon
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