Fluid tank comprising a ventilation filter

The present invention relates to a fluid tank (20) with a filling neck (21) comprising a ventilation filter arrangement (22). The filter arrangement (22) comprises a cylindrical filter housing (220) comprising a top wall (221) and bottom wall (222) and having a cross section with a hollow center portion (CP). The ventilation filter arrangement (22) is arranged to be connected to the filling neck (21), and the housing (220) has an inner wall (223) arranged to surround the filling neck (21) and an outer wall (224) arranged to peripherally surround a filter element (225) positioned in a space limited by the inner wall (223), outer wall (224), top wall (221) and bottom wall (222). The filter housing (220) comprises a first air intake channel (231) and the inner wall (223) of the filter housing comprises at least one outlet channel (233) through which the filtered air can pass. The filling neck (21) comprises a second air intake channel (235) arranged to supply filtered air to the fluid tank. The fluid tank has a compact construction and reduces the amount of contaminants in the fluid.