Cargo floor heat aids in eliminating cold air layers in which area?

• A. To automatically maintain the cargo compartment floor at a predetermined temperature
• B. Aiding in eliminating cold air layers in the cabin
• C. To heat the cockpit
• D. Increases refrigerant efficiency

Answer: (B)

Warm air rises and cold air tends to settle near the floor. Heating the cargo floor introduces warmth at the lower part of the cabin, which reduces the density difference between the air near the floor and the air higher up. This helps the air mix more effectively and eliminates the cold air layer that can accumulate along the cabin floor, improving overall comfort for occupants. The purpose isn’t to maintain a set cargo-floor temperature, heat the cockpit, or directly boost refrigerant efficiency; it’s about removing that persistent cold-air layer in the cabin where people are.