you would go in in the morning get a job and load your truck. this included: pipe, a job box with all fitting, thermopan, pvc pipe and a furnace. You would get to your job site and install all heating boots and pipe to second floor and stub them into the basement, install bathroom fans, all hoods needed for fresh air and exhaust and then you would hang and vent the furnace. furnaces ranged from 60,000 btuh - 120,000 btuh. you would do this all by yourself in one day. The bosses were easy to get along with and if you had any questions when on the job you could call and get the info required.
working by yourself and if your an apprentice it is good pay, if you can get a house done a day. pay ranged from 361-550 a house.
long work days and sometimes had to come in on weekends, if you made a mistake you have to go fix it for no pay.