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Lennox HP13-018 Air Filter
Filters are available in many varieties and specific sizes, which all depends on your personal demands for clean air and air handler size requirements. The actual size of the main system air filter choice that needs to be made but rather a requirement of your furnace or handler. It is suggested the your furnace filter is replaced for a clean one four times a year for optimal air quality inside the house.
Major warnings your Lennox air filter needs replacing ASAP
- It is greatly recommended to replace your air filter every 90 days in order to have cleaner breathable air inside
- It looks dusty and replacing it would be best soon
- If you place a light source behind it, the light cannot shine through to the other side of the dirt filled filter
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