If you answered yes, there's a good chance that window films can help your facility save energy. Estimate the savings potential. A computer simulation will usually be necessary to calculate the potential energy savings from window film installation. If using daylighting is feasible, consider spectrally selective films. Pick a product with a long warranty from a reputable manufacturer.
Quality varies among manufacturers.
Films generally last for 5 to 15 years, depending on both the quality of the product and the environment in which it is installed. Ask film manufacturers about the expected lifetime of their product in a particular application. Warranties are typically 5 to 10 years, although some manufacturers offer lifetime warranties in certain situations. Avoid using films in certain situations. There are reports of windows cracking due to heat build-up when dark film is used on nonstrengthened glass with a high solar exposure.