Though sunlight can bathe your home in a natural glow, the sun’s UV rays can damage people and furnishings. Your air conditioning does not need to run as frequently, so energy bills go down. Also, the insulating properties of window film provide year-round savings by diminishing home heat loss through the glass during colder weather. The General Services Administration estimates that low-E film averages 29% annual HVAC savings around a home’s perimeter. Low-E solar films considerably improve a window’s insulation. ![]() Some solar films are “low-emissivity” or “low-E,” which means they do not emit the heat they absorb from the sun into the room. When completely closed and correctly adjusted, traditional blinds with vertical or horizontal slats can reduce heat gain by reflecting sunlight. If they’re highly reflective and fully closed, they can reduce solar heat gain by about 45%. However, because they have gaps, they do not add any insulation.īecause window film reflects sunlight before it enters the home, it can block up to 80% of the sun’s heat and absorb the remaining heat. Because they are insulated, they can also prevent heat loss by 40% during the heating season.However, some styles, primarily darker shades, can absorb and trap solar heat, expelling it into a room. ![]() ![]() Specifically designed insulated cellular shades, which fold up accordion-style, can reduce 80% of solar heat coming in through the windows. Shades can effectively block sunlight and reduce incoming heat when they are light-colored, lowered or closed completely and do not have slats.
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