No person shall construct, install, reinstall, repair, replace, reset, alter, convert or move in any building, structure or appurtenance thereto, without first obtaining a permit therefor from the Commissioner as follows:
(a) Refrigeration producing systems, cooling systems or air conditioning units or systems where such units are integral parts of such cooling systems; or
(b) Heat producing systems, combustion plants, heating systems and air conditioning units in dwelling houses where such units are integral parts of such heating systems.