Installers directory

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We have the Internet's most complete directory to help you find qualified installers in your area. This information is and will always be free.

The 10-Degree Rule For Solar Gain

When you read about solar systems, especially solar thermal and passive systems, you may come across the "10-Degree Rule". The rule states that, wherever possible, a building... Read more »

Solar Gain in Passive Solar Homes

As with all forms of solar power – solar thermal, PV panels, solar chimneys and others – the amount and quality of sunlight to which a home is exposed is extremely important in... Read more »

Using Thermal Mass for Cooling

In most cases, we talk about thermal mass as something that absorbs and stores useful heat from the sun's light, releasing it when your home gets colder to maintain a comfortable... Read more »

The Importance of Insulation

The best advice is often the advice you hear every time you ask a question. In the case of solar energy, the best advice is always "fix everything you can fix before you start... Read more »

Alternative Water Systems

There are two main ways you can improve your home's ecological impact when it comes to water: installing alternative systems for domestic and outside water use, and implementing... Read more »

Software to Analyze Home Energy Performance

Analyzing your passive solar home's energy performance by hand is long-winded, cumbersome, and prone to error. Between ten and twenty years ago, a variety of software tools... Read more »

How a Vapor Barrier Works

No matter how much insulation you install in your home and no matter how good it is, it's completely useless if it gets wet. To avoid moisture creeping into the insulation, you... Read more »

The Importance of Insulation

The best advice is often the advice you hear every time you ask a question. In the case of solar energy, the best advice is always "fix everything you can fix before you start... Read more »

The 10-Degree Rule For Solar Gain

When you read about solar systems, especially solar thermal and passive systems, you may come across the "10-Degree Rule". The rule states that, wherever possible, a building... Read more »

Every 21 Seconds...

According to the latest data, between 800 and 900 million people are without access to good water in the world. Reliable sources like Water.org indicate that;- every 21 seconds, a... Read more »

The Beauty of a Bus Ride

There is so much beauty in using public transportation. It puts you in contexts that you would not have discovered had you taken the usual taxi or driven a car. I have spent the... Read more »

Nissan Leaf; Love it or hate it.

I invite you to participate in my dilemma. My house is off the grid, running on solar. I commute less than 30 miles per day on average. I need an electric car. Everything else... Read more »

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