Quote:
Originally Posted by Maddie2009
Also, will the unit manual tell me if a filter at the return vent is required?
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No, typically not. Units are somewhat customized and designed for your home. As it is wise to have your A/C system cleaned and serviced at least once a year, the serviceperson should be able to tell you your proper filtering needs. Typically you will have one filter. Some folks add another in a return grille, the concern here is if it is too restrictive you can starve your unit of airflow.
Happy to help if you like to post pictures....
Frank