Extreme temperatures are the toughest part of the on site installs, whether it is 154 degrees in SC heatwave or 12 degrees and windy in UT it does not change the fact that we must work outside to permit easy access to the buses without the need to constantly stop all work and move busses in and out of the shops. This is why what may take a bus shop mechanic 2 hours we can perform in 18 minutes. They are required to work in a semi controlled professional atmosphere, but our job description encourages freezing and overheating.