General Passive Strategies

 Keya Lea

For Aggressive Efficiency, Choose Passive Solar

For Aggressive Efficiency, Choose Passive Solar

By NORBERT M. LECHNER As we discussed in the November/ December issue, low-hanging solar-responsive design strategies reduce a building’s energy consumption and typically cost less than the high-hanging solar-collecting technologies — or nothing at all. (See Choose the Low-Hanging Fruit by Lechner.) In this issue we focus on passive solar heating techniques.   Most passive […]

 Keya Lea

White is the Greenest Color

White is the Greenest Color

Text and photos by NORBERT M. LECHNER This article was first printed in the August 2012 issue of Solar Today. When it comes to solar-responsive design, perhaps the lowest-hanging fruit is choosing white. Selecting white design elements can save much energy, thereby saving money and helping to save the planet. White roofs dramatically reduce overheating […]

 Keya Lea

Playing the Angles for Solar-Responsive Design

Playing the Angles for Solar-Responsive Design

This article first appeared in the May 2012 issue of Solar Today. Text and Photos by NORBERT M. LECHNER In all but the simplest situations, knowledge of solar geometry is vital for creating successful solar-responsive designs. Even though we have known since Copernicus’ time that the Earth revolves around the sun, for our present purposes […]

 Keya Lea

Choose the Low-Hanging Fruit

Choose the Low-Hanging Fruit

This article was first published in Solar Today in the Nov/Dec 2011 issue. By NORBERT M. LECHNER For most people, “solar energy” invokes the technologies of photovoltaics (PV) and, more generally, active solar systems that use electrical or mechanical systems, like most solar water-heating systems. Unfortunately, these strategies are “high-hanging fruit” in that they are […]