Solar Hot Water Systems

Solar hot water systems are systems that absorb the heat of the sun to heat water for the use within a building.

Passive Solar

Passive solar is any means to use the heat from the sun to provide for the heating or energy needs of a building without any means of mechanical assistance. The easiest method of passive solar involves the proper siting of a building to take advantage of the sun when it is at a low horizon or angle, but to provide shading when the sun is at its highest during the hottest part of the day. Another means of passive solar design is to build the floor of a building with some type of thermal mass such as concrete that absorbs the heat - and releases the heat at night when it is cooler.

Wind Turbines on Buildings

Previously, wind turbines as an energy source were typically not located on building or within urban areas. With the concern about green energy and global warming, however, new technologies have recently been developed to allow wind turbines to be built on top of buildings -- and be able to deal with the shifting wind directions typical of urban areas. As such, wind turbines are increasingly a part of sustainable green buildings.

Recycled Cellulose Insulation

Traditional fiberglass insulation is harmful to the environment both in its manufacturer and in its use. A more eco-friendly type of insulation is recycled cellulose insulation. The cellulose can come from such diverse sources as recycled newspapers or recycled blue jeans.

Geothermal Heating and Cooling

Geothermal heating and cooling involves the use of ground source heat pumps to take advantage of the fairly constant ground temperature to reduce the cost of normal heat pumps to provide for heating and cooling. Wells are dug to a depth of typically 200 feet to obtain a source of air that is approximately 55 degrees year around. This reduces the need for cooling the outside air for air conditioning in the summer and for heating the outside air in the winter, and thus provides for a more efficient form of heating and air conditioning of buildings.

Natural Ventilation - to Vent Hot Air

Another method of sustainable green building design is to incorporate means of natural ventilation into a building to vent hot air in the summer time, and thus reduce the need for energy used for air conditioning.

EXAMPLES OF SUSTAINABLE "GREEN" BUILDINGS

Following are examples of "green" buildings incorporating sustainable design principles.