I actually use the car wash more often in the winter then in the summer, my vehicles are often dirty and dusty
from the conditions that they are used in field and dirt roads. So they get dirty fast and muddy when it rains.
But, in the winter so much salt and calcium chloride is used as ice melters so people can drive just like it was summer
on clean dry roads that our vehicles get covered in salty slush and the good car washs have an under carriage washs
which helps to slow down the rusting and corrosion, which will render a vehicle unusable quickly.
You bring up a point why used southern cars are a better buy than northern bought cars LOL
Honestly, I remember all the crud on the car in winter, but perhaps I'm wrong in that there would be some days during winter that would actually hit over freezing temps (I'm thinking that's when I hit the car wash)
I'll need to ask my son why kind of heat they have at the car wash inside the washing area.
That said, I do remember doing some snow melt jobs with radiant heating outside in the driveway up North (generally using a boiler), but in the last 20 plus years living in NC, NO ONE is looking at spending money for outside radiant heating heating is drive/walk ways. Point being, depending on where you own the car wash in the US, it may or may not be financially worthwhile to spend the money on for heat for short winter months where the norm is not "very cold" compared to up north.
Son got up and talked with him. Text this morning from the manager they are closed today. I asked my son about the heating. They have one small area that is heated and I asked him what it looked like, but he said they are not allowed in that area so he doesn't know.
Reality is if car is being washed inside, the COMPLETE area where any water is used needs to heated over freezing temps. I'm guessing it's not worth the money vs having to close for the times where it's that cold.