GREAT attention to detail has gone into making the Astra temperature system effective and simple to use. The HVAC system has an integrated pollen filter, which is fully integrated into all the airflow functions and filters recirculated air as well as fresh air. The driver benefits from the use of large rotary dials for fan speed, temperature and air distribution, plus big, tactile buttons for air-conditioning (if fitted), recirculation and rear demist. Meanwhile, all occupants are shown the outside temperature in the dash-mounted multi-function display. Australian requirements prompted the introduction of UV-resistant doorhandles and tinted glass. The optional air-conditioning unit was also optimised for local conditions and a heavy-duty battery (66 Ah) and alternator (120A) are included to cope with Australian air-con requirements.