In 2008 HelioVolt invented an invention that will become the main source of energy to heat and cool many buildings in the future. The solar skin invention is made of copper indium gallium selenide which can be used to generate electricity from sunlight. This invention developed a faster, more cost-effective way to manufacture solar panels for use in many commercial buildings. A solar panel is so thin that it can be printed on the building material and it won’t even look apart from the old building material. The process of attaching the solar panel involves printing a fine layer of semiconductor directly onto glass, metal and other building materials. This process will allow the newly built buildings be able to power their building with solar energy from day one. The building will get the maximum energy possible from the sun because the entire building will be conducting energy while the sun shines.Solar Skin’ maximizes natural light and reduces heating or cooling demand. The heating and cooling energy demand for any building using the solar skin can be reduced. They need to first eliminate, or minimize, the need for heating and cooling. Then they can install the solar skin to create its own heating and cooling system that requires the minimum energy input to equal the demand for heating and cooling demand for the given building. To be able to use the solar skin they need to include it in the building plans while keeping the heating and cooling in mind.The solar screen, can be a combination with double glazed window units, which can provided the maximum amount of natural light to the spaces and, at the same time, minimizes the heat loss or gain.In colder periods the use of solar radiation for heating is controlled through the site responsive design of the ‘solar skin’ and building orientation. Similarly, solar radiation is blocked as a source of heat gain while in summer.This design has captured the opportunity for low energy comfort cooling and high indoor air quality by careful attention to ceiling height to floor plate ratio and operable fenestrations to make use of thermal buoyancy to drive natural ventilation. Natural ventilation flow is facilitated through tangential external walls, high and low level fenestration and venting skylights. To supplement airflow when needed, fans in the PCM units can be run to facilitate air movement through the space.The introduction of amorphous silicon (a-Si) alloy thin film technology can be a different way to reduce cost for solar cells. Since amorphous silicon alloy is more efficient absorbing light than its crystalline counterpart, the a-Si solar cell thickness can be 100 times less than that of conventional cells. If the cell thickness of amorphous silicon alloy is 100 times smaller than the previously used cell, than the material cost will be significantly reduced.By using a flexible, stainless steel substrate and polymer-based encapsulates, PV products using our technology can be very lightweight, flexible and durable. The cell is deposited using a vapor-deposition process at low temperatures; the energy payback time is therefore much smaller than that for the conventional technology (Sloan).The market for placing the solar skin onto new buildings are expected to skyrocket by 2015. The market is expected to grow to $7.5 billion from the previous years of $2.1 billion, according to Accenture Plc, citing research from NanoMarkets. The market of solar glass are also expected to increase to Sales of solar glass are expected to $4.2 billion by 2015. While walls integrating solar cells at $830 million. By 2015 solar tiles and shingles are also expected create $1.5 billion in profit (Louise Downing). Solar skin will eventually be the new use for heating and cooling in buildings. New buildings will have plans to put the solar skin onto the building while the construction is underway. This new technology is going to make the way we all heat and cool our houses outdated. There will be no need for the air ducts to lead the cold and hot air around the house. This design is much cheaper than the solar panels because it uses less material to make the same energy, and can built directly on the sidings of any buildings. This technology will eventually become the way all new buildings heat and cool themselves. I believe that this technology will be the most effective way to heat and cool a building for many years from now.