Abstract: An enclosure for protecting an air conditioning condenser unit is provided. The enclosure includes a cover for enclosing an outdoor condenser unit, the cover including (1) a metal frame for folding around and over the outdoor condenser unit, the metal frame including a plurality of panels, interconnected to at least one other panel and each panel having a plurality of metal edges, each panel sized for a corresponding section of the outdoor condenser unit, and each panel also includes a metal mesh extending between the metal edges, and (2) a metal security bar for interconnecting opposite panels via extension of the security bar underneath the outdoor condenser unit, whereby when folded around the outdoor condenser unit, the cover substantially approximates the shape of the outdoor condenser unit and prevents access to the outdoor condenser unit.