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AeroGarden: Easy, Efficient Indoor Gardening

by Justin Thomas •

In 2004, MetaEfficient.com pre-reviewed the AeroGrow aeroponics growing system. That was before the system was released. A couple of years ago, you couldn’t cut on your TV without seeing an ad for AeroGrow indoor gardening systems. It isn’t as ubiquitously advertised now, but it hasn’t disappeared from the market. In fact, five years after its initial release, there are several …

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The Best Shower Filter

by Justin Thomas •

Note: Please stop read this article, and read our updated shower filter article instead I wanted to post an update on my quest for the best shower filter. I received a lot of useful comments on my last shower filter post,¬†and I’ve also tested a couple of new shower filters.

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Irish Firm Claims World’s Most Efficient Solar Heater

by Justin Thomas •

An Irish company, Surface Power, has launched what could be the most efficient solar hot water panel ever produced. The company says it plans to distribute its product internationally. The new solar panel was independently certified by TUV Rhineland. Their tests verified that when compared to other solar panels, Surface Power’s solar panel was in one case as much as …

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Finding Inexpensive Non-Toxic Bedding

by Justin Thomas •

Non-Toxic Bedding

Update 2016: See my updated article on non-toxic bedding. We spend about one third of our lives in bed. It’s a time when our body regenerates itself. We release about 3 liters of water while we sleep, and our bodies go through cycles of cooling down and heating up. We also absorb substances through our skin and through our lungs. …

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Lenovo’s New Monitors Are Greenest Available

by Justin Thomas •

Lenovo has released a range of new LCD monitors that are probably the greenest monitors available. The new Thinkvision L2440x monitor received Greenpeace’s highest rating in their Green Electronics Survey 2008 (PDF File). Recently, I had a chance to review the Thinkvision L2440p 24″ widescreen LCD monitor. The L2440p uses only 30 watts to power its display. As I write …

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2010 Review Of Tankless Water Heaters

by Justin Thomas •

Tankless water heaters have been used in Europe and Asia for 50 years, and they are gaining popularity in the US. Right now they represent about 8% of new sales in the US. Tankless heaters, also called on-demand, flash or instant water heaters, qualify for a $300 federal tax credit. How efficient are tankless water heaters?

A Unified Meta-Theory Of Design

by Justin Thomas •

A Unified Meta-Theory Of Design combining optimization theory, green design theory, universal theory, design pattern theory, and zen theory. Meta-efficient in 2009.

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The Best 12V Solar Battery Chargers

by Justin Thomas •

Sunforce Solar 12V Charger

Solar cells really shine at charging your batteries at remote location or on a boat. They are also useful for maintaining a charge on a 12V battery, such as a car battery. The best (and most expensive) solar battery chargers are flexible, thin-film solar cells. These cells can be folded and packed away easily. Sunforce Solar Battery Chargers You can …