Why is proper ventilation crucial when using LPG or CNG?

Proper ventilation is crucial when using LPG or CNG primarily to prevent gas build-up. Both liquefied petroleum gas (LPG) and compressed natural gas (CNG) are lighter than air; however, in specific conditions, especially if there are leaks or improper usage, these gases can accumulate in enclosed spaces. This build-up poses a significant risk of explosion or fire, as the gas can reach flammable concentrations. Adequate ventilation ensures that any leaked gas is quickly dispersed, minimizing the risk of hazardous situations developing.

While enhanced combustion efficiency, reduction of toxic fumes, and maintenance of equipment longevity are important considerations in the use of LPG and CNG, they do not directly relate to the immediate safety concerns posed by gas accumulation. Proper ventilation is fundamentally a safety measure aimed at preventing dangerous situations that can arise from insufficient airflow and gas exposure.