How much humidity does anthurium besseae aff. (dark velvet) need?

Anthurium besseae aff. (Dark Velvet) genuinely is one of the humidity-hungry minority, wanting 60-80%. That is above what a normal room provides, so this is a case where intervention is worth it — dry air shows up as crispy leaf edges and browning tips. Only around one plant in six actually needs this, and anthurium besseae aff. (dark velvet) is one of them.

Yes — raise humidity around the plant deliberately. What works, in order: a small humidifier nearby (by far the most effective), grouping plants together so they share transpired moisture, or standing the pot on a tray of damp pebbles (the pot base must sit above the water, not in it). A bathroom or kitchen with a window often suits anthurium besseae aff. (dark velvet) better than a living room.

Relying on misting. It lifts humidity for a few minutes at most, then it is gone — it cannot hold anthurium besseae aff. (dark velvet) at 60-80%, and wet leaves overnight encourage fungal problems. A humidifier or grouping does what misting only appears to do.

Crisp brown leaf edges and browning tips are the reliable tell. Yellowing whole leaves is usually a watering issue rather than dry air, and slow growth in winter is normally low light — humidity gets blamed for a lot it does not cause.