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Williams 3509622 Filter
The filter has the main responsibility for removing microscopic dust and other tiny bits as it is being forced through the system. This simple filter can keep the unit dust-free and make it run much more efficient while also filtering the air you breathe in your house. Because of the nature of filtering air, the unit filter must be swapped out for a new one or perhaps cleaned thoroughly at least twice a year if not more, in order to keep things clean.
Major clues your main filter needs replacing ASAP
- The system air filter looks brown and must be replaced real soon
- Professionals have recommended to replace the filter four times a year for clean air inside the house
- When you face it toward a light, the light cannot shine through to the other side of the air filter
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