Which statement best describes balancing daylighting with solar gains in a building design?

• A. Use shading and glazing to balance
• B. Avoid any shading
• C. Daylighting always increases cooling
• D. Daylighting has no energy impact

Answer: (A)

Daylight design aims to provide bright, comfortable interiors while keeping cooling and lighting costs under control. The best way to balance daylighting with solar gains is to combine shading strategies with smart glazing. External shading devices like overhangs, louvers, or fins block the sun’s heat before it reaches the glass, reducing heat gain and glare while still letting ample daylight enter. Pair that with glazing choices that transmit visible light well but limit heat transfer—such as low-emissivity coatings and appropriate SHGC (solar heat gain coefficient) and visible transmittance values—so you get daylight without overwhelming the cooling system. With this approach, daylight reduces electrical lighting needs while keeping cooling loads in check. The other ideas miss the practical balance: avoiding shading can lead to overheating; daylighting doesn’t inherently increase cooling if managed with proper shading and glazing, and daylighting does impact energy use because it affects both lighting and thermal loads.