This is drawing of south wall test in Poteet, Texas.

Even more information about PCM in buildings can be found by Googling ;       

PCM enhanced building envelopes

The average cost of residential electricity was 12¢/kWh in the U.S. in April 2009, and ranged from 7¢ in North Dakota to 26¢ in Hawaii.

QUAD -- One quadrillion (10¹⁵ or 1,000,000,000,000,000) British thermal units (Btus). An amount of energy equal to 170 million barrels of oil. Total U.S. consumption of all forms of energy is (in the 1990s) about 83 quads in an average year.

One Quad=293071083333 kilowatt hours.

That is 35 BILLION dollars per year.

PCM placed in 20% of the homes will save between .2 and .5 Quads per year. That equates to 7 to 17 billion dollars per year savings.