Borst Engineering & Construction LLC
Calculator Instructions

Return to Calculator Tab

Passive Solar Fenestration Exposure Calculator - Borst Engineering & Construction LLC
Latitude (Deg, South is Negative)
Longitude (Deg, West is Negative)
Time Zone (Hours, West is Negative)
Daylight Saving Time (0=No, 1=Yes, Blank=USA)
Twilight Defintion (0=Civil, 1=Nautical, 2=Astronomical)
Solar or Local Time (0=Solar, 1=Local)
Hour (1-24)
Day (1-31)
Month (1-12)
South Wall Deviation from True South (Deg, West is Negative)
Height of Glass (Feet)
Height of Bottom of Glass above Floor (Feet)
Height of Roof Overhang from Top of Glass (Feet, from Passive Solar Roof Overhang Design Calculator)
Depth of Roof Overhang from Glass (Feet, from Passive Solar Roof Overhang Design Calculator)
Terrain Obstacle Altitude Angle - 60 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 70 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 80 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - True East (Deg or leave blank)
Terrain Obstacle Altitude Angle - 100 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 110 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 120 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 130 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 140 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 150 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 160 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 170 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - True South (Deg or leave blank)
Terrain Obstacle Altitude Angle - 190 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 200 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 210 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 220 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 230 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 240 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 250 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 260 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - True West (Deg or leave blank)
Terrain Obstacle Altitude Angle - 280 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 290 Deg (Deg or leave blank)
Terrain Obstacle Altitude Angle - 300 Deg (Deg or leave blank)
Solar Declination Angle (Deg of Latitude)
Solar Azimuth Angle (Deg, North is 0)
Solar Altitude Angle (Deg, Horizon is 0)
Is irradiance available to fenestration at this time?
Irradiance Allowed by Roof Overhang (% of Glass Area)
Distance from Glass Solar Irradiance Strikes Floor (Feet)
Sunrise Time (or End of Morning Twilight)
First Light Time
Last Light Time
Sunset Time (or Beginning of Evening Twilight)
First Light Solar Azimuth Angle (Deg, North is 0)
Last Light Solar Azimuth Angle (Deg, North is 0)
Borst Engineering & Construction LLC

Terms of Use