In: Economics
A traditional-furnace costs $224 and consumes $155 per year in fuel over its 11 year lifetime. A condensing-furnace costs $440 and consumes $80 per year in fuel over its 11 year lifetime. If interest rates are12% per year, which is the better investment?
The annual equivalent cost of traditional-furnace = 224(A/P, 12%, 11) + 155
= 224(0.1684) + 155
= 37.72 + 155
= $192.72
The annual equivalent cost of condensing -furnace = 440(A/P, 12%, 11) + 80
= 440(0.1684) + 80
= 74.10 + 80
= $154.10
Since the annual equivalent cost of condensing -furnace is lower than the traditional-furnace, therefore, investment in condensing -furnace is better investment.