Patent ID: 8039774

Claim:
A heating system in the form of a multi-layer panel comprising: a first electrically insulating layer; a second electrically insulating layer; a third electrically insulating layer; a first electrically conductive resistive layer sandwiched between said first and second electrically insulating layers; a second electrically conductive resistive layer sandwiched between said second and third electrically insulating layers; said first electrically conductive resistive layer having a first electrical connection and a second electrical connection, said first and second electrical connections being electrically connected to each other only by electrically resistive material of said first electrically conductive resistive layer extending between said first and second electrical connections; said second electrically conductive resistive layer having a first electrical connection being electrically connected with said first electrical connection of said first electrically conductive resistive layer; and said second electrically conductive resistive layer being electrically isolated from said second electrical connection of said first electrically conductive resistive layer by said second electrically insulating layer.