LPG is heavier than air by what factor?

LPG is heavier than air by what factor?

• A. 0.5 times heavier
• B. 1.0 times heavier
• C. 2 times heavier
• D. 1.5 times heavier than air

Answer: (D)

LPG is heavier than air, so leaks tend to stay low and flow along the ground into low spots, basements, or depressions. The density of LPG (propane/butane mix) is about 1.5 times that of air, making it approximately 1.5 times heavier than air. That’s why the correct factor is 1.5. The other options would imply LPG is lighter, about the same as, or even much heavier than air, none of which matches its real behavior. This heavier-than-air tendency explains why detectors and ventilation considerations for LPG are often focused toward floor level and low-lying areas.

LPG is heavier than air, so leaks tend to stay low and flow along the ground into low spots, basements, or depressions. The density of LPG (propane/butane mix) is about 1.5 times that of air, making it approximately 1.5 times heavier than air. That’s why the correct factor is 1.5. The other options would imply LPG is lighter, about the same as, or even much heavier than air, none of which matches its real behavior. This heavier-than-air tendency explains why detectors and ventilation considerations for LPG are often focused toward floor level and low-lying areas.