For ambient temperature between 35 C and 45 C, within how many minutes should conditioned air be started with doors and windows closed?

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Multiple Choice

For ambient temperature between 35 C and 45 C, within how many minutes should conditioned air be started with doors and windows closed?

Explanation:
In hot conditions, the cabin needs enough lead time for the environmental control system to remove heat and bring the cabin to the comfortable setpoint. When ambient is between 35 and 45 C, allowing about 60 minutes for conditioned air before departure gives the system enough time to circulate, dehumidify, and stabilize at the desired temperature by boarding. Keeping doors and windows closed is essential because outside air or leaks would undermine cooling efficiency and force the system to work harder or longer to reach the target temperature. This 60-minute window ensures the cabin is conditioned properly and ready for passengers.

In hot conditions, the cabin needs enough lead time for the environmental control system to remove heat and bring the cabin to the comfortable setpoint. When ambient is between 35 and 45 C, allowing about 60 minutes for conditioned air before departure gives the system enough time to circulate, dehumidify, and stabilize at the desired temperature by boarding. Keeping doors and windows closed is essential because outside air or leaks would undermine cooling efficiency and force the system to work harder or longer to reach the target temperature. This 60-minute window ensures the cabin is conditioned properly and ready for passengers.

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