I am dealing with a number of health and safety violations at a chain hotel. One of the items I noted for them to correct was to install access covers over the two furnaces in the utility room. These are old furnaces and they cannot find the covers, so the correction has not been made. My question - is there a requirement that furnaces have covers and if so where can I find the code section? This is one correction I wrote down without really knowing a code section to back it up.