Do Energy Star Ratings Account For Product Lifespan?

Do Energy Star Ratings Account For Product Lifespan?

Cambria Bold
Oct 12, 2010

Q: Do Energy Star product ratings take into account product lifespan and the environmental impact of planned obsolescence? When I was young, appliances lasted forever. Now it seems that they begin to have problems as early as 7 or 8 years after they are delivered. It takes energy to manufacture, transport and dispose of appliances. I'd like to think that these costs are factored into Energy Star's evaluations, but I'm not sure that they are. Can you clarify?

Sent by Chuck

Editor: Here's what our friends at Green Home Guide have to say.

Answered by David Bergman, David Bergman Architect

There are two types of energy consumed by an appliance.
  • The one that we're most familiar with is the energy used while the appliance is in operation (or in case of vampire power, while it is plugged in).
  • The other type -- and what you're inquiring about -- is known as embodied energy: the energy required by the other phases of an appliance's life cycle. As you astutely point out, it takes energy to manufacture an appliance, (as well to acquire the raw materials), transport it to factories, warehouses, stores and homes, and then to dispose of it via recycling or landfill.
Energy consumption is greatest during use phase.
As far as I am aware, Energy Star looks only at energy consumed by the use of an appliance and does not consider embodied energy. With some types of products, that would be a serious limitation. Appliances, though, tend to last a fairly long time and the vast majority of appliances' energy consumption occurs during that usage phase. One way to think of it: the appliance is manufactured (and disposed of) once, but used many, many times.
That said, I suspect you are right that appliances are not as durable as they once were, probably due to their increasing complexity and reliance on electronic components. I dread the day when the controller on my range goes all HAL on me (what do you think you're cooking, Dave?) because repairing it will cost nearly as much as getting a new range.
Durability can be a problem.
We've looked before at the question of whether it is greener to replace or reuse an appliance. Oddly enough, appliance durability can actually be a problem for energy conservation.
  • Refrigerators, for example, tend to last forever (unless, of course, it's a holiday weekend and your fridge has suddenly decided to abandon you in your time of need, leaving you with a rapidly spoiling feast for twelve).
  • That means it takes a long time for more energy-efficient models to replace the old hogs that keep churning away.
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