We have owned the car wash for about 17 years. we usually have only a couple of days of below temperatures and our weep sytem with our PDQ handles it fine. However, we experienced 7 days of below freezing this last year. Doors for a 7 day freeze (once a year) seems expensive. Anybody set up to keep an IBA from freezing for short periods of time? Thinking some type of set up with a space heater?