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Nordyne B4VM Air Filter
Filters exist in many different types and sizes, which all depends on your personal choice for how clean you want the air and air handler requirements. The actual size of the HVAC air filter optional choice because it is based on the declared size of your air handler. It is advised that the filter is exchanged for a new one every 90 days or so due to the filter clogging up and restricting the flow of air inside the house.
Warnings of a failing primary air filter
- Light is unable to shine through a dirty filter
- The unit air filter looks brown and should be replaced before tomorrow
- Manufacturers have recommended to switch out the air filter in your unit every season of the year in order for the machine to run more efficient and to breathe easier inside
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