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Lennox G40DF-60D-135 Air Filter
Filters come in a wide array of filtering levels, depending on your demands for clean air and air handler requirements. It is suggested that the filter that filters out particles from your home is changed four times a year because the filter can get clogged and may result in poor air flow inside the house. The height, length and width of the whole house filter personal choice due to the requirement of the manufacturer of your system.
Key symptoms of a failing air filter
- When you hold the filter up to the light, it cannot shine through to the other side of a very dirty air filter
- The unit air filter looks dusty and it would be best to replace it right away
- Professionals have recommended to replace your air filter every 90 days to help prevent mold and bacteria build-up
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