Voicing of F Half Diminished

Rooted I

Back to Fm7b5

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Left hand
F3Ab3Cb4Eb4
Family
4-Note Rooted

The Rooted I voicing of Fm7b5 stacks F, Ab, Cb and Eb from the bottom up: the root, minor 3rd, flat 5th and minor 7th of the chord.

It's one of the 4-Note Rooted voicings: four-note voicings with the root on the bottom or inside, in the left hand. The other for Fm7b5 is Rooted II.