Heat exchanger same work jaise air coled chiller me heat exchanger refrigrent ko vapor se liquid and liquid ko vapor me convert karta hai work same hai bt process chaged hai
hvac ek system hai jisme alag alag unit hota hai jisme ,AHU,fcu,ductable unit,Fahu or bhi unit hai sabka alag alag complain ata hai jaise AHU me jyada tar belt ka issue hota hai