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Greening Your Kitchen: The Refrigerator

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For those trying to live a greener life, one of the biggest challenges in the kitchen is also one of its most necessary elements- the refrigerator. For most people, the refrigerator is probably the most power-hungry appliance in the house, so looking for ways to reduce that consumption is essential...

 
 

If you are in the market for a new fridge, top-freezer models are the most energy-efficient and repair-free, followed by bottom-freezer models. Though many people tout the convenience of side-by-side refrigerator/freezers, they are more likely to need repair and can use roughly 7 to 13 percent more energy than top-freezer models. Keep in mind as well that automatic icemakers increase energy use by 14 to 20 percent.


The Sun Frost RF-12 refrigerator pictured above was The National Georgraphic Green Guide's choice for greenest product: with an energy star rating of 51% and an annual operating cost of just $17.78, it is well worth the $2,279 asking price.


If a new fridge isn't in the cards, here are some usage tips from The Green Guide to help make your existing fridge a littlle more energy efficient:

  • Don't keep your fridge too cold. Refrigerators should be kept between 37 and 40 degrees and freezers at 5 degrees. Colder temperatures waste energy. To test the temperature, leave an appliance thermometer in a glass of water in the middle shelf for 24 hours. In the freezer, place a thermometer among packs of frozen food.
  • Clean the coils annually.
  • Cover food and drink to avoid evaporation in the fridge, which can force the compressor to work harder.
  • Keep your freezer filled. Frozen blocks of food keep freezer temperatures more stable.
  • Don't clutter the fridge top; it can hamper the compressor's proper air circulation.
  • Don't put your refrigerator in direct sunlight or next to an oven or dishwasher.
  • Check the door seals. They should be able to hold a piece of paper in place.
  • Defrost the freezer regularly and avoid frost build-ups of more than a quarter-inch.

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Comments (9)

Not sure if that was a misprint, or that the compound characteristic "energy efficient and repair free" changes the claculation, but bottom-freezer models are, in general, slightly more efficint than top-freezer models. They're close enough in general efficiency that the differences between models dwarf the differneces between those two styles generally, so it probably makes sense not to get too hung up on top vs. bottom. As for repairs, the top freezer models may be cheaper. I haven't seen much data. The bottom-freezer frequently have more complicated mechanisms than the simple door, so perhaps they are more prone to need repairs. The most repair-prone parts of fridges tend to be the water/ice features, not the basic cooling mechanism, so if you're looking to avoid repair costs as much as possible, you may want to opt for a Brita and some ice cube trays instead. (Through-the-door water and ice also tends to reduce textbook efficiency as well, although I'm not sure how big the difference is in real world use -- opening and closing a fridge frequently to get water and ice could eat up the savings pretty quickl, I suppose.)

posted by pilgrim on March 18th 2009 at 9:52am
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I second pilgrim's comment; bottom freezers would be slightly more energy efficient. This is pretty intuitive...cool air sinks while warm air rises, so a freezer drawer on the bottom wouldn't lose as much cool air with each opening (because the cool air naturally pools toward the bottom) as a top-freezer would.

posted by michelle123 on March 18th 2009 at 10:08am
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For those who own a home though not having built-in water and icemaker will be undesirable to some potential buyers. more green savvy buyers might see it as desirable. You have tro know your market.

posted by Indy Jeffrey on March 18th 2009 at 10:15am
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I just had a new refrigerator installed yesterday. I felt like I did a lot of research prior to choosing this bottom freezer, french door model to replace my old side-by-side.

The Energy Guide tag estimates the yearly operating cost to be $49, probably more than half what my old model cost.

posted by Kathryn on March 18th 2009 at 10:46am
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When I saw the picture and the topic, I assumed the text would give some information on ways to tuck refrigerators into cozy insulated nooks as a way to reduce energy use. Seems possible.
Along those lines, I wonder if it is possible to install a tub into an insulated enclosure. Bathwater in my apartment's smallish tub seems to lose heat far too quickly. Could this be improved by some kind of insulation?
These might be silly questions. Feel free to say that, if it's true.

posted by rapunzel on March 18th 2009 at 10:52am
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You don't want to tuck your fridge in an insulated enclosure because air needs to the coils on the back. If they don't get sufficient air flow they will get hotter and the efficiency will go down.

Significant heat loss is through the gasket that seals the door to the body of the fridge when it is closed, so make sure that fits tightly and there aren't any gaps.

posted by jinx on March 18th 2009 at 11:01am
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to respond to rapunzels query about bathwater, insulation is the way to keep your bathwater warmer, but it should be put in place underneath and around the tub before the bathtub is installed, an insulated "enclosure" wouldn't help keep the water warm. Unfortunately, builders and remodelers rarely do this.

posted by fjorlief on March 18th 2009 at 11:18am
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After 46 years of filling ice trays myself, I had an icemaker installed in my freezer last year and have enjoyed every single repair-free minute of it.

posted by madampince on March 18th 2009 at 7:46pm
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rapunzel: i put insulation around the sides of my tub from the bottom - kept the water warm longer, but also lead to mold growing!

posted by rapidtransitman on March 18th 2009 at 8:12pm
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