I am an engineer in a 750,000 sq. ft. complex consisting of multiple buildings. My specialty is HVAC but have to help the carpenter, plumber, and electrician when I can. During the normal week there is 2.5 HVAC techs to handle any calls that come in such as the office that is too hot at 73 or the one that is too cold at 70. along with performing pm's on all the equipment. When it hits 95 or better I am more then likely on the roof most of the day (either the black tarred type which burns your feet or white reflective throwing all the heat back at you). A little less then 1/2 the site is prodiction so when HVAC breaks all eyes are on us asking when it will be done since production is down. For my first 9 months on the site I was the third shift engineer (which means you where alone). The hours where 11:00PM to 7:30 AM Sunday night to Friday morning.

I would say the worst single job I had was when I did residential years ago. The hottest day of the summer and I had to work on an attic fan. My supervisor stood at the bottom of the ladder in the garage and I went up. I remember being covered in sweet almost as soon as I got in the attic. Literally every 5 minutes he made me come down and grab some water. The first thing was checking the thermostat on the fan. Spinning the dial it should have activated the fan at 135-140. This meant thats when the switch closed and was the approximate temperature up there.