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Lennox CB27UH-036 Air Filter
Air Filters exist in many different filtering types which all depends on your personal choice for how clean you want the air and the specific size of filter you need for your system. It is advised that the filter is replaced for a clean one every 90 days or so to maintain the best air quality through the ducts. The height, length and width of the HVAC air filter personal choice because of the constraint of your furnace or handler.
Cues to an under performing filter
- It is highly advised to replace your air filter every three months in order to have clean air running through the unit
- It looks dirty and could be replaced as soon as humanly possible
- With a light behind the air filter, the light is unable to break through to the other side of a very dirty air filter
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