design tools

sustainable by design provides a suite of shareware design tools on sustainable energy topics:

SunAngle
our premier tool for solar angle calculations

SunPosition
calculates a time series of basic solar angle data

Sol Path
visualization of the path of the sun across the sky

Window Overhang Design
visualization of the shade provided by a window overhang at a given time

Window Overhang Annual Analysis
visualization of window overhang shading performance for an entire year

Window Heat Gain
calculation of monthly heat gain through windows

CFL Economics
compares economics of CFL vs incandescent lamps