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A properly air sealed and insulated attic is the most important component of a green, energy efficient home. An inefficient attic causes energy waste in many ways.
Due to a physics phenomena known as the "stack effect", the air inside a building moves upwards, towards the upper levels of the house. If the attic is unsealed, all the conditioned air that you paid to heat and cool, will leak into the attic and escape to the outside.
On hot days throughout the year, the roof shingles absorb a lot of the sun's heat that then radiates into the attic, causing an attic to reach temperatures of up to 150 degrees! That heat will then be transferred to your living space and make your home uncomfortable and hard to cool.
Air ducts running through unconditioned and improperly insulated attics make for an even bigger source of energy waste. During the summer, metal ducts are conducting the air that you paid to cool through a scorching attic. The cool air is being re-heated before it reaches the rooms in your house! During the winter, the opposite happens. The hot air is reduced through the metal ducts that run through a freezing cold attic.
An energy efficient attic features a combination of thorough air sealing, a layer of insulation within the U.S. Department of Energy R-Value recommendations, and proper roof vents to prevent mold and ice damming. Air ducts that run through an unconditioned attic also need to be air sealed and properly insulated.
If you would like to make your home more comfortable and energy efficient trust your local Dr. Energy Saver home energy conservation specialist:.
31 май 2012
