Awnings can reduce a home's internal
temperature by 8° to 15° F (5°C - 8°C)
Solar radiation through glass is
responsible for approximately 20% of the load on a residential air conditioner.
On a hot day, more energy is lost
through one square foot of glass than through an entire insulated wall.
A fabric awning reduced heat gain by 55% to 65%
during the period of the day when the sun shines directly on southern facing
windows, and 72% to 77% for western exposures. 
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