I also had an old kiln when I took a new job. It was on a third
floor of an old building, the floor was wood. There was a hood vent
that went nowhere.
If you look at OSHA regulations that will help you decide, YES
technician. Not your out of pocket expense though.
Since ceramics was part of the program, we had to get all new
equipment, move it to a basement with a stone floor. It was a
digital kiln (no cones) and we got an enviromentally approved vent
to the outside that required construction.
The school electrician was not up to the complexity of the wiring
work and did it wrong. Technician had to come back and re-wire.
Happy ending: After all that, the kiln worked great! The program was
enhanced by results of new equipment. Popular!
Other concerns have to do with clay and dust. This info is probably
archived because last year there was a lot of discussion on the
listserv about it. Clay dust is incredibly harmful, especially to
your students with compromised upper respiratory systems or lung
problems (asthma). You have to keep the area spotlessly clear of
dust. If it is a general art room, all the more concern. If kids
start throwing clay around or dropping it on the floor and tracking
dust, you will have a short-lived program.
I had to address all of the above. This listserv is just beyond
helpful with such technical matters. Experienced colleagues.
I hope it all works out for you. Students love ceramics.