Home      About      Contact      Submit an Item      
Passive    PV    Homes    Commercial    Wind    Projects    DIY    Resources    Tools    Materials    
Watch Twelve Essential Steps to Net Zero Energy

Twelve Essential Steps to Net Zero Energy Video

Watch Highline Park NYC Thumbnail

Highline Park NYC Video

Watch Highline Park Design Thumbnail

Highline Park Fly-Through Animation Design Video






Green Roof Energy Calculator

Compare vegetated roof with dark or white roof

The green roof energy calculator allows you to compare the annual energy performance of a building with a vegetative green roof to the same building with either a dark roof or a white roof . At the present time simulations are available for new construction (ASHRAE 90.1-2004) and old construction (pre-ASHRAE 90.1-2004) office and residential buildings driven by typical precipitation and weather data. Representation of an irrigation schedule is optional.

This calculator was developed through a collaboration involving researchers and staff at Portland State University, University of Toronto, and Green Roofs for Healthy Cities. The effort was funded by the US Green Building Council with additional financial and in-kind support from University of Toronto, Portland State University, GRHC, and Environment Canada.