Utilities working with customers to deliver energy-efficiency savings can add window film to the list of cost-effective solutions.

A comprehensive analysis of window film found it to be the most cost-effective energy saving choice for Californians when used in retrofit applications on homes and buildings, according to the non-profit International Window Film Association in an independent analysis performed by ConSol.

The study compared installing window film on existing structures in California with other traditional energy saving techniques such as updating HVAC systems, air sealing and caulking.