The present invention relates to a laundry dryer including: a casing rotatably supporting a drum, and including a basement (24) defining a basement plane (X,Y) and in which a first longitudinal half (24 first half) and a second longitudinal half (24 second half) are identifiable by means of a first plane (P1) perpendicular to said basement plane (X,Y) and passing through a drum axis (R); a heat pump system (30) having a heat pump circuit including a first heat exchanger (31) and a second heat exchanger (32); a process air conduit (18) including a basement air duct formed in said basement comprising a basement duct portion (28) channeling said process air between a process air exit (28in) where process air exits from said first heat exchanger and a process air outlet (19) where process air exits said basement, said process air outlet being located within the second longitudinal half of said basement, said basement duct portion including one or more duct walls (28w) which in a section along a sectioning plane (PT) parallel to a basement plane (X,Y) defines an inner curve (28b) and an outer curve (28a); wherein a tangent (T1, T2, T3) to said inner curve in said second longitudinal half of said basement forms an angle different from 90 degrees with an axis (H1) formed by sectioning the first plane with said sectioning plane (PT) for at least between 90% and 100% of the length (L2) of the inner curve in said second longitudinal half.