If chute doors are inspected regularly and maintained in perfect working order, flames are contained and extinguished. Even after tenants evacuate safely, faulty chute doors can cause you to lose your building, your insurance coverage and, because of large liability suits, even your business.In the case of just a small fire, chute doors that have been modified with non-O.E.M. parts or drilled to accept hasps can still be costly. U.L. ratings are compromised, and you, not the chute manufacturer, bear legal responsibility for door failure.