Tuesday, June 5, 2012

GreenerChoices.org | Green product watch: Best dehumidifiers 6/12

GreenerChoices.org | Green product watch: Best dehumidifiers 6/12

(This article is adapted from the June 2012 Consumer Reports magazine.)

Got that clammy feeling? In Consumer Reports’tests several dehumidifiers were tops at sucking moisture out of steamy spots that can breed mold and other allergens. 

The ideal indoor relative humidity is between 30 to 50 percent. At higher levels mold can grow. For the majority of persons, undisturbed mold does not pose serious health risks, according to the Centers for Disease Control. But the government says mold can be “a greater hazard for persons with conditions such as impaired host defenses or mold allergies.”

If you have only a minor outbreak in a very small area, you may be able to contain it without buying a dehumidifier. You can use a stiff brush, a non-ammonia detergent, and hot water to scrub mold off non-porous surfaces. To get between edges or tiles, use a stiff-bristle toothbrush or grout brush. 

You can also make a paste of baking soda and water and brush with that. Remember to ventilate the room where you’re working, wear gloves, and use a protective mask, since mold spores can be inhaled.

New energy efficiency standards

Dehumidifiers work by using a fan to pull air over two sets of refrigerant-filled coils, which pull moisture from the air and drip it into a tank. Different models vary according to how many pints of moisture they can remove in 24 hours. In Consumer Reports’ tests, some models came much closer than others to the humidity levels that were set on the humidistat; some used less energy or ran more quietly; and some models handled simulated power outages better than others.

As of October 2012, federal energy efficiency standards for dehumidifiers will become roughly 20 percent stricter, on average. Energy Star models typically will have to capture about 4 pints of water for every kilowatt-hour of electricity used. That could save you about $20 per year, though prices could rise by up to $40 to cover the cost of better airflow and other improvements.

Large capacity models already approach the new standards and tend to be the most energy efficient, removing up to 75 pints per day. They can also handle a wider range of humidity levels with little or no additional noise. And you may be able to run a large model on a lower, quieter setting. Some manufacturers are scaling back on small units, which remove fewer than 45 pints per day and have been least impressive overall.




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