Invisco has sold the whole house fan designs to Thorwaldson Whole House Fans. http://thorwaldsonwholehousefans.com/
Invisco was started by Kurt Shafer in 1978 as the INVISible screen COmpany after Kurt invented the first rollup window screen he had ever seen. Then a patent search in downtown Los Angeles revealed the first patent was in 1864.
In 1995 Kurt was looking for web cam software and found the USC Tommy Trojan statue web cam put together by a team that included Carl Sutter. Carl agreed to create SnapNSend for Kurt – the first commercially available webcam software in history.
In 1999 Kurt was called by Gil Lugo with the the United States Postal Service to ask if Kurt could supply his webcam software in computers for the USPS construction sites. Gil wanted the computer and he needed a camera with pan, tilt and zoom functions and a solar system to power it all when mounted on remote poles with no power.
For this project Kurt determined that he would need 3 solar panels (about 750 watts) and several batteries to power the system at night. He shipped the first system to Philadelphia for installation at the new USPS site there.
In 2004 Kurt got licensed as a home inspector and he made it a point to ask his home buying clients if they were interested in more information about solar power and whole house fans. He was asked by RG Solar to work with them to gather leads. After a change in management there he worked with Joe Koziki at AA Solar in Temecula. Most recently he joined POWUR in Del Mar California to take advantage of their modern marketing and sales methods.
On Grid Defined
Most solar power systems are on grid, meaning that they are connected through an electric circuit to the public power coming into the house. That is called the grid. When the sun is down the solar power is not there so the house is powered by the grid. When the sun rises and solar power builds up then the power used by the house is supplied by the solar panels and not by the grid. When power comes from the grid the power meter tracks the amount of power and adds charges to the power bill.
Net Metering Defined
Most public power companies offer net metering which is valuable to the homeowner because it reduces the power bill when the amount of solar power is greater than the amount of power the house uses. In that case, some of the power is fed back to the public grid through the power meter. The power meter effectively runs backwards, much like running a car in reverse to reduce the miles on the odometer. The power charges are reduced by the meter so the charges are the Net result of power coming in and power going out.
Off Grid Defined
The ideal solar power system is one that does not need to depend on any outside power source. It is capable of supplying all the power your home needs all the time. Since the sun goes down, power must be stored so it can be used when the sun is down. That is done with batteries just as a car battery stores power when the motor is off. When there is sufficient battery storage to supply power all the time the house can be disconnected from the public power grid. Hence the term Off Grid. Now, the fact is that it is not necessary to be off grid all the time unless the house is far from public power lines.