

What about putting up one of those curtains of plastic slats like they have in the walk-in coolers of restaurants ? That could help keep the heat in the cab portion while they’re opening the door.
Yes, force the behaviour of closing the door while they’re away from the truck, for energy savings and for security, and reinforce that with some training and reminders, but the added barrier could keep the coolness in the driver area just a bit better.








As per rfc2119 there is a difference between MAY be profitable and MUST be profitable.
And I’d argue it SHOULD NOT be profitable, since that’s a measure of how much it’s over-charging for what is a basic need (even for those who don’t realize it is).