The bulk update request #943 is pending approval.

create implication folding_fan (452) -> hand_fan (1257)
create implication uchiwa_fan (132) -> hand_fan (1257) # duplicate of implication #9709
create implication paper_fan (196) -> hand_fan (1257)
create implication hand_fan (1257) -> fan_(utility) (0)
create alias handheld_fan (0) -> hand_fan (1257)
create implication ceiling_fan (345) -> mechanical_fan (0)
create implication portable_fan (0) -> rotary_fan (12)
create implication rotary_fan (12) -> mechanical_fan (0)
create implication box_fan (30) -> mechanical_fan (0)
create implication mechanical_fan (0) -> fan_(utility) (0)
create alias electric_fan (1669) -> mechanical_fan (0)
create implication war_fan (17) -> folding_fan (452)
create implication war_fan (17) -> weapon (142100)
create alias tower_fan (3) -> column_fan (1)
create implication bladeless_fan (5) -> mechanical_fan (0)
create implication column_fan (1) -> mechanical_fan (0)
create implication feather_fan (15) -> hand_fan (1257)
create implication industrial_fan (10) -> mechanical_fan (0)

Reason: Discussion welcome. Implying fans to categories and an umbrella tag, aliasing a couple of redundant tags.
Is portable_fan as redundant as I think it is?

Honorable mentions:
post #2708250 post #1297216
Tower/column fans; Feather fans
post #917455 post #2373797
Ventilation/industrial fans; Bladeless/ring/halo fans

I'm not very familiar with the various fan tags, but most of this BUR looks good to me. Though I think portable_fan should instead be implicated to rotary_fan, since portable_fan appears to be a specific handheld variant of a rotary_fan.

For the examples you've provided, maybe adding the following aliases and implications to the BUR would be a good idea:

d.d.m. said:
I'm not very familiar with the various fan tags, but most of this BUR looks good to me. Though I think portable_fan should instead be implicated to rotary_fan, since portable_fan appears to be a specific handheld variant of a rotary_fan.

For the examples you've provided, maybe adding the following aliases and implications to the BUR would be a good idea:

alias tower_fan -> column_fan
imply bladeless_fan -> mechanical_fan
imply column_fan -> mechanical_fan
imply feather_fan -> hand_fan
imply industrial_fan -> mechanical_fan

Went ahead and added your recommendations, no harm in having a few extras, and an implication is just safer than an alias.