Trane XR80 Furnace Filter Size Air Flow Configuration Cabinet Width Filter Size (s) Upflow 14-1/2″ 14x25x1 (bottom) Upflow 17-1/2″ 17x25x1 Upflow 21″ 20x25x1 (bottom) Upflow 24-1/2″ 24x25x1 (bottom) 1 more rows …
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