air condition blades climate conditioning cooler cooling electronics fan fans industrial machine machinery motion motor noise rotating rotor speed technology ventilation air box building chill cold comfort condition conditioner cool coolant heat outside refrigeration unit a/c air conditioning air-conditioning aire aire condicionado fresh machina refrescante refresh refreshing square architecture chimney duct ducts exhaust factory industry iron pipe tube Australian cancelation cancelled citizen citizenship conditional conditions discontinued expired identification identity invalid no-entitlements no-longer-authorised no-longer-authorized non-valid out-of-date outdated passport past past-use-by-date personal-details unofficial unusable 3-D advice blue communicating communication eye-catching glassy indication information informative informing insiders limited-access liquidy no-public-access notification notifying plastic prohibition raised restriction security semi-transparent sign signs staff staff-only warning words workers black clear transparent blade blow blower breeze button propeller