The commissioner shall have the power and it shall be his duty to enforce all laws and the rules and regulations of the board of standards and appeals in respect to:
1. The manufacture, storage, sale, transportation or use of combustibles, chemicals, explosives, inflammable or other dangerous substances, articles, compounds or mixtures.
2. The investigation of the cause, circumstances and origin of fires and the suppression of arson.
3. The prevention of fires or danger to life or property therefrom, excluding provisions relating to structural conditions and excluding provisions relating to the installation of oil-burning equipment and all appurtenances thereof.
The powers conferred by this section shall not extend to the enforcement of any provision of the health code or the regulations of the board of health, or of any provision of the building code relating to the construction or alteration of buildings or the installation of service equipment, except as otherwise provided therein, or interfere in any manner with the powers and duties of the board of health or the chairman of the board of health or of the department of buildings or of the commissioner of buildings.