This metal AC/heated enclosure allows alarm control panels to be protected from extreme temperatures as well as other areas requiring UL Type 4 protection. The extra-large, super tough, heavy-duty metal enclosures guard against vandalism, as well as dirt, dust and grime. The size of the metal AC/heated enclosure also allows the enclosure to house significantly sized electronic devices with space to spare. The enclosures mount to the wall enabling the units to be protected in their designated location. Both the enclosure and AC/heater unit have a durable finish to help protect against corrosion.