SolarDucts: Heating Air and Generating Power

Solar Duct Solar Air Heater and Cogenerator

Solar energy is often used to heat water or generate electricity, but it can also be used to heat air. The SolarDuct is a new device that uses sunlight to heat air before it enter a ventilator. They are modular units that can be installed on buildings with flat roofs.

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Electric Tankless Water Heaters

Note: This post has been expanded and updated for 2009! Tankless water heaters only heat water when it is needed. About 8% to 30% of the energy consumed by a standard water heater goes to keeping the water hot while it’s not being used. New tankless systems heat the water instantly when you turn on […]

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Metaefficient: Trombe Walls

Incorporating a Trombe Wall into a house is one of the most efficient ways to capture the heat of the sun. They work in the mildest to the most severe of climates. Basically, sunlight strikes the wall through a window, and the Trombe Wall heats up, causing warm air to flow into a room.

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The Solar House: Free Heating

People often think of using solar energy for producing electricity, but it is actually easier to harness the power of the sun to heat your home. It’s free heat that has been utilized since ancient times but few modern architects or builders really understand the principles involved. The Solar House, by Dan Chiras, explains architectural […]

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