Exterior window shades can reduce your cooling costs by up to 40%, with most Palm Beach Gardens homeowners seeing 25-30% savings on their monthly bills. This happens because exterior shades block heat before it enters your windows – up to 90% of solar heat gain.The U.S. Department of Energy confirms that windows account for 25-30% of your home’s heat gain, and 76% of sunlight hitting standard double-pane windows becomes heat inside your home. By stopping this heat outside, your AC doesn’t work as hard to maintain comfortable temperatures.In Palm Beach Gardens’ climate, where cooling costs can dominate your electric bill from April through October, these savings add up quickly. Most installations pay for themselves within 2-3 years through energy savings alone.