Design Winter Temperature is crucial for choosing the right window film, as it must endure the local minimum temperatures without losing effectiveness or damaging the glass. Films not designed for the locale's winter conditions might become brittle or fail to insulate properly.

Altitude affects window film due to changes in barometric pressure. At higher elevations, lower air pressure can increase stress on double-pane windows, potentially leading to damage when combined with the thermal effects of window film. Selecting a film that can withstand these pressures is vital.

Adjacent Reflecting Surfaces, such as water, other buildings, or snow, can increase sunlight and heat reflection, raising the risk of thermal stress on the glass. It's important to consider these factors by choosing films with high heat rejection or altering the environment to reduce reflection, ensuring the film's effectiveness and the glass's integrity.