Heat & sun
Your AC runs eight months a year. Your windows decide how hard.
Most of the heat entering a Florida home comes through glass, not walls. Clear single-pane and older aluminum-frame windows pass sun straight into the room, and the AC spends the afternoon undoing it. Low-E coatings reflect that radiant heat back outside before it becomes your problem.
- Solar Heat Gain Coefficient is the number that matters in Florida, more than U-factor
- West and south-facing rooms usually show the difference first
- Insulated frames stop the conduction path an aluminum frame leaves wide open
- Qualifying products earn the federal 25C credit, up to $1,200 per year




