HVAC stands for Heating, Ventilation and Air conditioning is the technology of automotive inside environmental comfort. system design based on thermodynamics, heat transfer fluid mechanics. very important everyone now a days in our project we are designing ventilation multilevel underground parking space, When cars move from area to outside space they release toxic gases fuels like carbon monox...

welders may suffer from welding fumes generated during the process if the ventilation systems are improperly applied. the objective of the present work was to study the mitigation of air pollutants at welding stations, using different ventilation scenarios. four air pollutants including iron oxide, respirable dust, ozone, and carbon monoxide were measured during four different ventilation scena...