Performed exhaust hood inspection on roof. Found all units to be installed correctly without any issues. Correct gauge wire to be run, in conduit, power disconnects readily available, and all secured down to roof with watertight seal. Found shower exhaust to be seized with damaged blade bent backwards. Motor will need to replaced and blade to restore operation. Bathroom exhaust fan also down found seized and temping over 200 degrees. Will need to have motor replaced to restore operation. Found exhaust hoods to have excess debris on air exhaust screen causing units to not move as much air. Ductwork under systems also loaded with debris and lint causing excess pressure on motors. Dirty ductwork likely cause of motor failure and excess pressure. This will cause motors to strain and excess vibration. Not a install issue.