Field measurements quantified the density of vegetation that casts shade directly on homes, and aerial photo interpretation was used to evaluate potential wind shielding offered to individual homes by vegetation and adjacent buildings. Statistical analysis of data indicated that variability of structures, including different levels of insulation, infiltration, and efficiencies of space-conditioning appliances mask the effects of vegetation on energy use. Analysis was further complicated by a wide range of energy use habits of individual homeowners. However, trends were observed that suggest proper placement of trees with regard to seasonal solar gain and wind patterns may yield substantial savings of energy. Improper placement of trees may yield significant increase in net levels of energy use for space conditioning. On the recommendation of the National Urban and Community Forestry Advisory Council, the USDA Forest Service Urban and Community Forestry Program awarded a $20,000 grant toward the $43,500 project. For further information, contact Cindy Terry, ACRT, Inc., P.O. Box 401, Cuyahoga Falls, OH 44221. Phone: (800) 622-2562 ext. 234. E-mail: askacrt@acrtinc.com. ACRT's website may be found at http://www.acrtinc.com.

1993 Costs & Benefits of Urban Forests Project