AIR-CONDITIONING is available as an option on Commodore Executive. Vents are provided for both front and rear occupants and the climate controls are mounted high on the dash fascia to make adjustment a relatively simple task. The major switchgear comprises three rotary dials for the usual functions of fan speed, temperature and air distribution. Buttons for the air-conditioning on/off (if fitted) and rear demist are on the far left-hand side. Testing of the system was carried out in Western Australia, New South Wales, the Northern Territory, Dubai, Arizona and the Holden climate tunnel at Fishermens Bend. The air-conditioning system is designed to reduce a cabin temperature of 80 degrees Celsius (achieved with an hour of full sun) to a comfortable level after 20 minutes of driving at a steady speed of 50km/h.