DB-BURBY6

Truckers! Ways to stay cool if one doesn't have an APU & Company won't let you idle. Check out the 12v AC unit on very bottom.

PAC1020 Tent Air Conditioner
【Low Noise】Quiet work , low energy consumption, cooling noise can be below 45 decibels, dual DC silent brushless fans can provide you with a comfortable environment and also protect you from noise interference. 【Quality Upgrade】 The air conditioner is equipped with a high-density EPP casing, which is vibration resistant and fearless of road bumps. 【Rapid
Portable Air Conditioner (12V)
Product: Compact & Rugged Portable DC Air Conditioner (with remote controller) Model Number: LC2810E-AC Voltage: DC 12V Refrigerant: R134A Capacity: ≥500W to 700W (2,387Bt

https://www.etsy.com/listing/1581036296/portable-ac-window-vent-for-freightliner

You can also make a window insert if needed out of plexiglass, plastic material and or foam or board even.

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GIZMO-SIX