EquipmentUp to date · Jan 15, 2026
Attic Fan (Solar-Powered)
A ventilation fan installed in the roof or gable that is powered by a small integrated solar panel, reducing attic temperatures by 20-40 degrees F and lowering cooling costs.
Why It Matters
A hot attic (150+ degrees F in summer) radiates heat into living spaces below. Solar attic fans cost $300-600 and reduce air conditioning energy by 10-15%.
Related Terms
Whole-House Fan
A large fan installed in the ceiling/attic that pulls cool evening air through open windows and exhausts hot air from the attic. Can reduce air conditioning use by 50-90% in dry climates.
R-Value
A measure of thermal resistance — how well a material resists heat flow. Higher R-values mean better insulation. Recommended attic R-values range from R-38 to R-60 depending on climate zone.