A canopy for a compressor or generator installation comprising a chassis with - a base plate comprising a body with a mounting surface bounded by a polygonal peripheral edge; and - a mounting frame containing this base plate and going around the peripheral edge; whereby the canopy further comprises a number of corner stays, whereby each corner stay is provided with a mounting end which is configured to be mounted onto the chassis, whereby at each corner of the peripheral edge, at least one corner stay is mounted with its mounting end onto the chassis, whereby each corner stay in a mounted state extends from the mounting surface of the base plate in a direction essentially perpendicular to the mounting surface and outwards from the body of the base plate, and whereby each corner stay in a mounted state has a free end which is opposite to the mounting end of this corner stay and which is not mounted onto the mounting surface; and whereby the canopy further comprises at least one roof panel, wherein at each one corner of the peripheral edge, the free end of the at least one corner stay is configured to be connected by means of at least one lateral beam to the free end of the at least one corner stay which is mounted at a corner adjacent to said one corner; that the canopy further comprises a number of lateral beams such that, at each one corner of the peripheral edge, the free end of the at least one corner stay at said one corner is connected to the free end of the at least one corner stay which is mounted at a corner adjacent to said one corner; that the canopy further comprises a door configured at an edge of the door to be hung onto one of the lateral beams; and characterized in that the door is configured to be hung onto the one of the lateral beams by means of at least two knobs which are provided at said edge of the door, on a side of the door whose edges in a hung state of the door are all tangent to an internal space of the canopy. - a base plate comprising a body with a mounting surface bounded by a polygonal peripheral edge; and - a mounting frame containing this base plate and going around the peripheral edge; whereby the canopy further comprises a number of corner stays, whereby each corner stay is provided with a mounting end which is configured to be mounted onto the chassis, whereby at each corner of the peripheral edge, at least one corner stay is mounted with its mounting end onto the chassis, whereby each corner stay in a mounted state extends from the mounting surface of the base plate in a direction essentially perpendicular to the mounting surface and outwards from the body of the base plate, and whereby each corner stay in a mounted state has a free end which is opposite to the mounting end of this corner stay and which is not mounted onto the mounting surface; and whereby the canopy further comprises at least one roof panel, wherein at each one corner of the peripheral edge, the free end of the at least one corner stay is configured to be connected by means of at least one lateral beam to the free end of the at least one corner stay which is mounted at a corner adjacent to said one corner; that the canopy further comprises a number of lateral beams such that, at each one corner of the peripheral edge, the free end of the at least one corner stay at said one corner is connected to the free end of the at least one corner stay which is mounted at a corner adjacent to said one corner; that the canopy further comprises a door configured at an edge of the door to be hung onto one of the lateral beams; and characterized in that the door is configured to be hung onto the one of the lateral beams by means of at least two knobs which are provided at said edge of the door, on a side of the door whose edges in a hung state of the door are all tangent to an internal space of the canopy.