(1) Licenses.

(a) No person shall engage in the business of installing or repairing warm air heating apparatus connected with flues or chimneys in any dwelling or building unless he has obtained a license from the Department of Licenses and Inspections.

(b) No license shall be issued unless the appicant:

(.1) is 21 years of age;

(.2) has satisfactorily passed the examination or investigation prescribed by the Department to determine professional qualifications and good moral character;

(.3) pays an original license fee of $50.00 and thereafter an annual renewal license fee of $40.00.[420]

(c) All licenses shall be conditioned upon continued compliance with the provisions of this Section.

(2) Permits. No person shall install any warm air heating apparatus in any dwelling or building unless he has obtained a permit pursuant to § 3-301.

(3) Manner of Installation or Repair. No person shall install or repair any warm air heating apparatus so that:

(a) it is connected with any flue or outlet which is not properly protected or found to be unsafe;

(b) it is not in compliance with the requirements of Titles 3 and 5.

(4) Certification. Upon completion of any installation or repair, the licensee shall so certify to the Fire Department.