Aircraft heating system

An electrothermal heater comprising:

• a first dielectric layer;
• a second dielectric layer;
• one or more conductive lanes;
• a pair of bus bars for each conductive lane;
• and
• a set of strips for each bus bar,
• wherein each of the dielectric layers and the one or more conductive lanes extend along the electrothermal heater from a first edge of the electrothermal heater to a second edge of the electrothermal heater, the first and second edges defining lateral edges of the electrothermal heater,
• wherein the first dielectric layer has a first façade section,
• wherein the second dielectric layer has a second façade section,
• wherein each of the one or more conductive lane has a conductive façade section sandwiched between the first and second façade sections,
• wherein the first, second, and conductive façade sections are configured to form a primary heating surface,
• wherein each of the pair of bus bars has a first section adapted for electrical connection to a power source and a harbor section electrically connected to one of a plurality of lateral ends of one of the conductive lanes,
• wherein each of the set of strips for each bus bar forms a haven having proximal walls and sheltering the harbor section of the bus bar, and
• wherein the first section of the bus bar adapted for electrical connection to a power source extends beyond the proximal walls of the haven.