Air conditioning in labs

I am new to using this discussion method so forgive me if this topic has been discussed previously. At Niagara College we are being asked to consider having our welding, automotive repair and culinary labs upgraded to include full air conditioning. In the past these requests were not entertained at the college as it was felt that students going into the work place would not experience air conditioning in whatever shops/ restaurants they would end up in. Our faculty are now saying that this is a health & safety issue. We do have a Heat Stress Prevention policy at the college which while written for staff is being applied to students in the labs. We are making efforts to upgrade our air handling equipment to provide for tempered air but this will probably not fully satisfy the programs involved. We have explored schedules to see if we can avoid using the labs when the humidity level is very high but this is difficult to achieve. With temperatures climbing every year we need to address this issue.
Having said all of that would it be possible to find out if other colleges have these type of labs fully air conditioned? If not is the rationale similar to what was used at NC in the past?
Thanks

Brian Hughes