Under the old system of depreciation, there is a 30% declining balance based on the economic life of an asset, and as long as the asset is generating money for you, it should be depreciated over that period of time. That's why we have 40-year-old boilers in place, and that's why we aren't moving to more energy-efficient systems.
Selon l'ancien système d'amortissement, un amortissement dégressif de 30 p. 100 s'applique à la durée de vie économique d'un bien, et, tant que ce bien vous permettra de faire de l'argent, il devrait être amorti sur cette période.