Q&A: Dishwashers Vs. Washing By Hand

  • August 25, 2011 8:06 pm

THE QUESTION:

Hi Alexandra,

What is your take on washing by hand and using a dishwasher??

Thanks, Meika

THE ANSWER:

Meika,

Thanks for your question.  The pros and cons of dishwashers have been debated down to the very last droplets of water, but at the end of the day they are more environmentally friendly than washing by hand, even if you factor in the energy used to manufacture and run the machine.  Here is an excerpt from Planet Home re the eco-friendliest way to wash dishes:

Running a dishwasher filled with scraped–not rinsed–dishes using eco-friendly detergent free of chlorine and phosphates is preferable to washing by hand, especially if the machine has a good Energy Star rating and you don’t use the energy-draining heated dry option.  Only run the dishwasher when it is totally full (although be sure you’re not blocking the water or aeration methods with any dishes, or they won’t get clean).  Face everything inward.  Enzymes in detergent are there to eat off scum.  If you have over-rinsed your dishes, they will have nothing to work on and will therefore dull the surfaces.  Get to know your dishwasher: Does it have a heater or a fan?  Does it have a grinder?  Operate accordingly.  Don’t put everything under the sun in a dishwasher.  Opening the door a crack after the washing cycle is complete will help the dishes air-dry more completely, but it will also increase indoor air pollution.  Fragrances and chemicals (including chlorine) in traditional auto-dishwashing products get turned into vapors when the machine heats up, and so do the pollutants (possibly chlorine or chloroform, maybe radon) in municipal water.  We breathe these vapors as they vent out of the machine during the washing cycle, making dishwashers a major source of indoor air pollution.  Minimize the danger by using a natural (chlorine bleach-free) detergent and by not opening that door until the machine has had a chance to cool off.  Giving the racks a shake will help get the residual droplets off the dishes.  Keep in mind that your municipal water supply will likely provide your machine with chlorine anyway.  A whole house water filter will reduce some of the worst vapors, as will keeping your kitchen well-ventilated.  If your dishes aren’t getting as clean as you’d like them, try using less detergent if you have soft water and adding a natural rinse aid if you have hard water.  This keep minerals in the water from redepositing on your dishes.  You can buy a natural version, or simply use white vinegar.  If you’re in the market for a new dishwasher, consider stainless steel interiors, which retain heat and reduce noise.  They also don’t off-gas (i.e., release fumes from the plastic) when heated to very high temperatures.

Hope this helps!

Best,

Alexandra

What You Don’t Know: Energy, Water, And Laundry

  • July 27, 2011 8:55 am

How often do you think about the environmental impact of your dirty clothes?  Believe it or not, about 90 percent of the energy used associated with doing laundry is just making water hot!  The other stuff like making detergents and the actual energy used by the machines accounts for only 10 percent. Fascinating, no?

When you reach for the hot water button on your washer, it’s hard to conjure up the image of a coal-fired power plant and the pollution it creates, but try to connect those dots. Picture greenhouse gases and the mercury residue in our waterways and seafood.  Although we may be home alone washing doormats, jeans, and rags, our actions always ripple out and affect the world beyond our walls.  Washing in cold will reduce that impact and minimize your dirty laundry’s footprint.  Here’s a little  excerpt from Planet Home about cold water washing:

By using cold water, you will also reduce your indoor air pollution: heating water blasts volatile chemicals, including chlorine in municipal water, into your breathing space.  If you’re using heavily fragranced conventional synthetic detergents, all of those vapors are also released when heated.  Cold water is truly all you need to clean, and some natural detergents are specially formulated to remove soils and stains in it.  Cold also prevents stains from setting, colors from bleeding and fading, and wools and silks from shrinking.

No one needs scalding water; you just wind up cooling it with cold – a big waste of energy.  Set your furnace lower – 125 degrees fahrenheit will suffice – and you’ll use less hot water when you choose warm on your washer.  If you have a choice, an on-demand or tankless water heater is best, followed by a high-efficiency gas version.  With electric, the heater itself is efficient, but the production and transmission of energy is not.

Another great way to save energy and reduce your carbon footprint is to air dry–outdoors or inside.  Using natural elements–sun and air–makes sense for so many reasons:

-It’s gentler on your clothes, provided you don’t leave them in the sun for too long (your colors will fade).

-It’s extremely environmentally friendly–dryers use 10 to 15 percent of domestic energy in the United States.

-Sunshine is great at killing bacteria, fungus, and mold–no chemical disinfectants needed!

-Indoor racks can help humidify dry indoor spaces, a big bonus come winter in my apartment.

Unfathomably, many municipalities and condo or co-op associations have banned laundry lines. If you’d like to sign a petition allowing line-drying where you live, go to www.right2dry.org.