Passive Systems Ventilation Systems Are Gaining Its Popularity Over Mechanical Ventilation
Systems Due to Its Inherent Characteristics Which Help In Reducing Cost During Operation, Lower
Requirement of Powerenergy As Well As Reduced Emission of Carbon Dioxide. Various Types Of
Ventilation Systems Are Available Which Utilizes Solar Energy and Wind Energy and As Well As Its
Combination Are Also Used. the Present Study Gives the Systematic Review of the Passive Ventilation
Systems For Achieving Indoor Environment Thermal Comfort. Variety of Passive Systems Which Can
Deliver Thermal Comfort. Both Experimental and Cfd Simulation Both Are Rigorously Utilized By The
Researchers For Analysis of Various Passive Ventilation Systems.Cfd Simulation Ventilation Systems Are
Devised By Various Researchers I.E. Wind Driven, Solar Driven and Hybrid Found to Be an Effective Tool To
Design Earth -To-Air Heat Exchanger (Eahe).It Can Be Also Conclude That Hybrid Systems Which Contains
Solar Chimney, Wind Tower As Well As Underground Systems Can Yield Indoor Environment.