Never, you can have the cold...I’ll take the heat any day.It can get close to 100 in New England some days, then you get days in wintah were its -10 with 20 mph winds , let me know how you’d like walking off stops during peak with snow up to the knees and ice under it !!
AC? First lets work on installing good heaters for the drivers up north. If you didn't have to wear long sleeves and pants to cover your tattoos and shaved your "medical wavier" beard you would be more comfortable.also if your in the north don't bother responding... you probably don't even sweat
Back when I was in an old high step P-800 I was a smoker. That truck was so drafty I would have to stop to light a cigarette. I remember many times having to use my ice scraper on the inside of the windows because there wasn't enough heat in the cab to keep the windows free of frost.