Sun Hours Estimator
Estimate peak sun hours and solar gain by city, season and facade orientation, for passive solar design decisions.
Location
Overrides city selection
Facade Orientation
Estimated Peak Sun Hours
Summer
—
hrs/day
Spring/Autumn
—
hrs/day
Winter
—
hrs/day
Annual avg
—
hrs/day
All-facades comparison (annual average)
N
—
NE
—
E
—
SE
—
S
—
SW
—
W
—
NW
—
Solar Gain Estimate
Peak solar gain (summer)
—
W
Useful gain (winter)
—
W
Design Guidance
South-facing (N hemisphere)
Best for passive solar gain in winter. Use overhangs to block high summer sun. Ideal for living spaces.
East-facing
Morning sun, good for bedrooms and breakfast areas. Lower afternoon heat gain.
West-facing
Afternoon/evening sun. Can cause overheating in summer, so use external shading or high-performance glazing.
North-facing
Diffuse light, minimal solar gain. Good for studios needing consistent north light. Minimize glazing here.