No AC unit can last forever, the same thing goes for every electrical equipment sold in the market, but you can lengthen its operation and lifespan through regular aircon servicing. Your unit will be assessed and checked from time to time. This means, you can get some parts changed (i.e. filters) to achieve a prolonged lifespan of the unit. Think of the Singapore dollars you will save, as you don’t have to buy another unit immediately when your AC acts up!