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| Heliochemical process
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The utilization of solar energy through photosynthesis. |
| Heliodon
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A device used to simulate the angle of the sun for assessing shading potentials of building structures or landscape features. |
| Heliostat
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A device that tracks the movement of the sun; used to orient solar concentrating systems. |
| Heliothermal
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Any process that uses solar radiation to produce useful heat. |
| Heliothermic
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Site planning that accounts for natural solar heating and cooling processes and their relationship to building shape, orientation, and siting. |
| Heliothermometer
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An instrument for measuring solar radiation. |
| Heliotropic
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Any device (or plant) that follows the sun's apparent movement across the sky. |
| Helmet
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A protective covering for the head or for both the face and neck during certain procedures. |
| Hem
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The edge created by folding metal back on itself. Metal is hemmed for safety and strength reasons. |
| Hemispherical bowl technology
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A solar energy concentrating technology that uses a linear receiver that tracks the focal area of a reflector or array of reflectors. |
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