Original Message

The bad translation if you're in an Airbus helicopter is "De-mist" button/knob. And if you're in an EC130 that blower and/or cockpit heat are crap (i.e. the fan itself is crap for the size of cockpit and the heater doesn't fully heat the cockpit until you sit at Fly for over 5 minutes and/or pick up off the ground (same for an H145). It's not like a 407 cockpit blower that works really well just by itself to clear moisture inside the windshield. Also, some aircraft work better to defog the windshield if you crank the cockpit heat on with the AC on at the same time. Counterintuitive but I've seen it work in an old 206.