The objective of HELI-COMFORT is to advance the technology readiness level of an innovative, purpose made, prototypic electrical heating system to a TRL 4 or higher level. After laboratory scale tests on smaller samples and an CFD based numerical simulation of such heating elements in a helicopter interior, this heating system will be integrated in an 1:1 helicopter mock-up and investigated under large laboratory environmental conditions in order to prove the ability to provide an adaptable power density coating for energy efficient heating of cockpit and cabin with reduced/eliminated need of bleed air from turbines.