Winter Storage, Brake Buddy
I have the Brake Buddy and emailed tech support about how to store it in the winter in Chicago. Here is the advice, I'd assume it applies to any air driven aux brake system.
"It is recommended that the unit be stored in a heated place. Or at least a place where it will be out of freezing temperature. There may be a small amount of condensation in the air system that can freeze and cause problems with the unit. To avoid the possibility of issues because of this we recommend storage in a heated place."
Makes a lot of sense, so I put the unit in the house instead of the garage.
BB tech support is great, I got the response in about 30 minutes.
2015 FR3 30DS
Towing 2016 Chevy Sonic LT