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Lennox SPA048H4 Air Filter
All air filters are made in lots of styles and sizings, in which the one you choose will depend on your demands for clean air and air handler size requirements. It is advised the your furnace filter is replaced for a clean one every 90 days or so to maintain the best air quality in the home. The measurement proportions of the main system air filter personal choice due to the requirement of your furnace or handler.
Major signs of a bad primary air filter
- If you hold it up to the light, it cannot show on the other side the air filter
- Professionals have recommended to switch out the air filter in your unit every season of the year in order to have clean air running through the unit
- Filter looks filthy and congested very badly
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