air
appliance
background
blade
blower
blue
body
circle
commercial
compressor
conditioner
cooling
cutout
detail
electric
energy
engine
equipment
factory
fan
flange
flow
gas
gear
generation
heap
heat
industrial
isolated
line
machinery
metal
modern
motor
outlet
power
pump
residential
rotor
shadow
steel
technology
temperature
tube
turbine
unit
ventilation
white