Yes, exterior sun control solutions such as solar screens and patio shades can significantly reduce cooling costs by blocking solar heat gain before it enters your home. By installing solar screens on windows exposed to direct sunlight, you can effectively reduce the amount of heat transferred indoors, thereby lessening the workload on your air conditioning system. Similarly, patio shades installed over outdoor living spaces create shaded areas, reducing the temperature of adjacent interior rooms. By minimizing solar heat gain, exterior sun control solutions not only improve comfort but also contribute to energy efficiency, ultimately leading to lower cooling expenses.