All mechanical equipment are designed to operate within certain limits. Having your HVAC system undergo preventive maintenance or service on a regular basis is very important because it will help the equipment to function properly and that extensive and costly repairs can be prevented. A regular inspection of the equipment where in proper operation of the equipment are checked and verified is the key thing for preventive maintenance program. It is a building code requirement and is also required by law. It is covered by Australian Standard.
Preventative Maintenance is also required for insurance purposes.