When the air is fully saturated, its relative humidity is 100 percent. Reliability - This is the concept of how long a device or process can operate properly without needing maintenance or replacement. Renewable Energy - Energy derived from resources that are regenerative or for all practical purposes can not be depleted. Resistance - The inherent characteristic of a material to inhibit the transfer of energy. In electrical conductors, electrical resistance results in the generation of heat.
Electrical resistance is measured in Ohms.
Resistance Heating - A type of heating system that provides heat from the resistance of an electrical current flowing through a conductor. The voltage developed across a cell by the current flow through the resistance of the cell. Resistor - An electrical device that resists electric current flow. Restructuring - The process of changing the structure of the electric power industry from one of guaranteed monopoly over service territories, as established by the Public Utility Holding Company Act of 1935, to one of open competition between power suppliers for customers in any area. Retrofit - The process of modifying a building's structure.