This presentation will be based on low temperature superconductor magnets producing field intensities greater than 12T. The primary approach presented will be for high efficiency windings (i.e. peak copper current densities at quench in excess of 1500 amps/mm² ) containing ten plus kiloamperes per turn operating at superfluid or boiling liquid helium temperatures protected by installed heaters. Several examples of protection heater designs and their subsequent operational characteristics will be presented. The various design parameter choices, their attributes and drawbacks will be enumerated. There are computer codes that aid in the design and the predicted operation of these protection schemes and their use will be discussed. There will be presented projections made as to the possible limits of the present protection heater technology. Both open and potted winding structures will be discussed, their similarities and differences.