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    shortsparky's Avatar
    shortsparky Posts: 1, Reputation: 1
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    #1

    Mar 14, 2009, 09:40 AM
    changing filter in armstrong hot air furnace
    I am a widow and not to good at fixing things. I got a fIlter for my furnace 16x20.But I am not sure how to put it in. The slot is on the upper right side of the horizontal unit. They said they changed it but after pulling it out I know they didn't. The filter looks the same on both sides. Can someone help me? Thanks
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #2

    Mar 14, 2009, 09:42 AM
    Locate the arrow on the filter and point it toward the unit. If no arrow is present then airflow direction doesn't matter.
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