There are a total of 28 unit heaters. 8 of these unit heaters have been abandoned number 17 thru 24. All the gas have been removed from those units. #13 has a broken flue pipe 90 8 to 10 inch that needs to be replaced and not firing due to a bad spark ignited that needs to be replaced. #15 has a blank stat and needs new aaa batteries then we can test that system. #16 is not firing I have gas to the unit and spark but no fire. They would like a estimate for 5 hours of labor plus parts to be sent and they can pass the info on to get it cleared to work on those units