Section 23BB. No respiratory therapist duly licensed under the provisions of sections twenty-three S to twenty-three U, inclusive, who, in good faith as a volunteer and without fee renders emergency care or treatment other than in the ordinary course of his practice, shall be liable in a suit for damages as a result of his acts or omissions nor shall he be liable to a hospital for its expenses if, under such emergency conditions, he orders a person hospitalized or causes his admission.