A fan unit for mobile use for ventilating an area in which it is deployed, in particular for circulating fresh air in areas contaminated by smoke or gases, comprising - a main frame having a base frame which can be positioned facing a support surface and at least one rear frame part extending up from the base frame, - a lifting frame, which lifting frame is mounted on the main frame so as to be pivotable about a first pivot axis of a first pivot arrangement extending in the horizontal direction, and - an axial fan having a drive unit, a fan wheel connected thereto in a driving arrangement, and a fan housing accommodating the fan wheel, which axial fan is retained on the lifting frame, - wherein the first pivot arrangement for the lifting frame is disposed on the one hand in the region of the frame part extending up from the base frame and on the other hand in a first end region of the lifting frame facing the rear frame part, - wherein the lifting frame is designed such that it projects out from the rear frame part in the direction towards a front face, and a second end region of the lifting frame spaced apart from the first end region can be adjusted in terms of its vertical distance from the base frame from a non-operating position lying closer to the base frame into a deployment position raised relative thereto, - and wherein a second pivot arrangement with a second pivot axis is disposed on the lifting frame, which second pivot arrangement is disposed at a distance apart from the first pivot arrangement, characterized in that - a support frame is mounted on the lifting frame so as to be pivotable in terms of its relative position with respect to the base frame about the second pivot axis of the second pivot arrangement, thereby enabling an inclination of the air flow generated by the axial fan to be adjusted, and - in that the axial fan is retained on the lifting frame with the support frame connected in between. - a main frame having a base frame which can be positioned facing a support surface and at least one rear frame part extending up from the base frame, - a lifting frame, which lifting frame is mounted on the main frame so as to be pivotable about a first pivot axis of a first pivot arrangement extending in the horizontal direction, and - an axial fan having a drive unit, a fan wheel connected thereto in a driving arrangement, and a fan housing accommodating the fan wheel, which axial fan is retained on the lifting frame, - wherein the first pivot arrangement for the lifting frame is disposed on the one hand in the region of the frame part extending up from the base frame and on the other hand in a first end region of the lifting frame facing the rear frame part, - wherein the lifting frame is designed such that it projects out from the rear frame part in the direction towards a front face, and a second end region of the lifting frame spaced apart from the first end region can be adjusted in terms of its vertical distance from the base frame from a non-operating position lying closer to the base frame into a deployment position raised relative thereto, - and wherein a second pivot arrangement with a second pivot axis is disposed on the lifting frame, which second pivot arrangement is disposed at a distance apart from the first pivot arrangement, - a support frame is mounted on the lifting frame so as to be pivotable in terms of its relative position with respect to the base frame about the second pivot axis of the second pivot arrangement, thereby enabling an inclination of the air flow generated by the axial fan to be adjusted, and - in that the axial fan is retained on the lifting frame with the support frame connected in between.